Part One Anatomic Science

[foxydentist]

Hey guys I thought of arranging the forum a bit by making a thread for each section for NBDE part one.... so if any body got any questions or need help in or got new useful information wana share in Anatomic Science writes here......... hope that would make it easy for everybody planning to take part one soon .. (like me )

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[intellidentia]

hi
thank u very much.keep up the spirit.good luck. when r u taking part1?

 

[meebo]

Hi
whats the conduction speed of SA Node

100-110 action potentials/ minute

 

[meebo]

conduction speed of sa node 100-110 action potential per minute

 

[confused tooth]

i m retaking nbde 1...
i have some questions which i remmember from my previous test but still couldn't get answers for them...so pls help with them...
1. wat causes protraction of mandible??
a. sup head of lat pterygoid
b. inf head of lat pterygoid
c. temporalis
d. medial pterygoid


rest are posted acc to subjects...

also pls tell the explanations

masseter ; Origin -zygomatic arch
Insertion-ramus & angle of mandible
Action-closes mouth
Nerve supply-muscular branch (V3)


medial pterygoid;O-medial surface of lateral pterygoid plate and maxillary tuberosity
I-medial surface of ramus and angle of mandible
A-closes mouth and helps protrude mandible
N.s.-muscular branch (V3)


lateral pterygoid; O-upper head: greater wing of sphenoid
lower head: lateral surface of lateral pterygoid plate
I-upper head: articular disc
lower head: neck of condyle
A-open and protrudes mandible, moves mandible side to side
Ns-muscular branch (V3)


temporalis;O-temporal fossa
I-coronoid process and anterior border of ramus
A-closes and retracts mandible
Ns-muscular branch (V3)

Diagrams:refer the following link

http://mywebpages.comcast.net/wnor/lesson4.htm


Hope this helps

 

[meebo]

2-e
the fibres gva,gsa of CN 9 synapse with dorsal nucleus of vagus &spinal nucleus of trigeminal

Hi guys

I would appreciate if some can help me in answering these questions

1) adipose tissue is found in the submucosa of the palate in the
a) rugae
b) incisive papilla
c) midline at the level of the molars
d) lateral area at the level of the premolars
e) lateral area at the level of the molars

2) pain fibres in the glossopharyngeal nerve synapse in the
a)nucleus ambigius
b)nucleus solitarius
c)hypoglossal nucleus
d)superior ganglion of craial nerve 9
e)spinal nuleus of the trigeminal nerve

3) neural crest cells give rise to which of the following
a)cells of renal medulla
b)cells of adrenal cortex
c)preganglionic sympathetic cell bodies
d)postganglionic sympathetic cell bodies
e)preganglionic parasympathetic cell bodies

 

[reni]

masseter ; Origin -zygomatic arch
Insertion-ramus & angle of mandible
Action-closes mouth
Nerve supply-muscular branch (V3)


medial pterygoid;O-medial surface of lateral pterygoid plate and maxillary tuberosity
I-medial surface of ramus and angle of mandible
A-closes mouth and helps protrude mandible
N.s.-muscular branch (V3)


lateral pterygoid; O-upper head: greater wing of sphenoid
lower head: lateral surface of lateral pterygoid plate
I-upper head: articular disc
lower head: neck of condyle
A-open and protrudes mandible, moves mandible side to side
Ns-muscular branch (V3)


temporalis;O-temporal fossa
I-coronoid process and anterior border of ramus
A-closes and retracts mandible
Ns-muscular branch (V3)

Diagrams:refer the following link

http://mywebpages.comcast.net/wnor/lesson4.htm


Hope this helps

Hi,
i know this is goin to sound very dumb but guys i m still confused......here it is said that medial pterygoid, lat pterygoid protudes mandible.......and in 1st page of our this thread......one of our fellow member said ans is temporalis.......i am very confused.....pls help.......thanks

 

[dosanjh]

hi reni.

dont get confused.. i was wrong that day...

posterior fibre of temporalis RETURD the mandible.

both leftt and rt lateral pterigoid muscles protude the mandible

anterior fibres of temporalis closes the mouth

MEDIAL PTERIGOID DOES NOT PROTUDE THE MANDIBLE , IT CLOSESTHE MOUTH OR YOU CAN SAY IT ELEVATES THE MANDIBLE

 

[reni]

hi reni.

dont get confused.. i was wrong that day...

posterior fibre of temporalis RETURD the mandible.

both leftt and rt lateral pterigoid muscles protude the mandible

anterior fibres of temporalis closes the mouth

MEDIAL PTERIGOID DOES NOT PROTUDE THE MANDIBLE , IT CLOSESTHE MOUTH OR YOU CAN SAY IT ELEVATES THE MANDIBLE

hi dosanjh,
thanks a lot for clearing out this confusion...just one more question...which one plays main role in protusion.........upper head of lat pterygoid or lower head of lat pterygoid???

and also i want to thank confused tooth member.......thanks a lot for that anatomy site...its indeed very helpful in all topics .....

 

[reni]

hi can somebody pls post nice explanation for walls of pterygopalatine fossa, infratemporal fossa.....


also, pls help with this:
infratemporal fossa and pterygopalatine fossa communicate via shpenopalatine foramen..........right??? pls correct me if i m wrong........


so, i want to know pterygomaxillary fissure connects which two fossae or cavity????

pls clear my confusion

thanks in advance
reni

 

[wireless_doc]

hi can somebody pls post nice explanation for walls of pterygopalatine fossa, infratemporal fossa.....


also, pls help with this:
infratemporal fossa and pterygopalatine fossa communicate via shpenopalatine foramen..........right??? pls correct me if i m wrong........


so, i want to know pterygomaxillary fissure connects which two fossae or cavity????

pls clear my confusion

thanks in advance
reni

Infratemporal fossa and pterygopalatine fossa communicate via pterygomaxillary fissure

Pterygopalatine fossa:
- Superior: communicates with the skull via the foramen rotundum
- Anterior: communicates with the orbit via the inferior orbital fissure
- Lateral: communicates with the infratemporal fossa via the pterygomaxillary fissure
- Medial: communicates with the nasal cavity through the sphenopalatine foramen

 

[wireless_doc]

which one plays main role in protusion.........upper head of lat pterygoid or lower head of lat pterygoid???

Inferior bellies: contract simultaneously causing the mandible to protrude
Superior bellies: assist in stablizing the articular disc during mouth closing

 

[reni]

Inferior bellies: contract simultaneously causing the mandible to protrude
Superior bellies: assist in stablizing the articular disc during mouth closing

hi wireless doc,
thanks a lot

 

[confused tooth]

hi wireless doc,
thanks a lot

There is also another clue to remeber this, remeber the insertion of inferior/lower head of lateral pterygoid is in the articular disc, hence it assists in stabilizing the articular disc during closure.....

Hope this helps

Ct

 

[dental doc80]

There is also another clue to remeber this, remeber the insertion of inferior/lower head of lateral pterygoid is in the articular disc, hence it assists in stabilizing the articular disc during closure.....

Hope this helps

Ct

doesnt the superior head inserts into the articular disc and the inferior head into the mandibualr condyle ????

 

[intellidentia]

hi ,
dental doc u r right, superior head inserts into art disc and inf belly into condylar neck.

 

[dental doc80]

hi ,
dental doc u r right, superior head inserts into art disc and inf belly into condylar neck.

hi...thnx for confirming...

 

[reni]

hi,
pls ans for following questions:
1. which of the following is the lobular area of liver??
a. bile duct
b. hepatic artery
c. portal vein
d. central vein

2. mass movement occur in large intestine when food enters which of the following??
a. mouth
b. colon
c. stomach
d. pharynx
e. esophagus

 

[meebo]

INFRA TEMPORAL FOSSA
frontposterior surface of maxilla
behind:styloid process
above:infra temporal surface of greater wing of sphenoid bone
medial:lateral pterygoid plate
lateral:ramus of mandible
PTERYGO PALATINE FOSSA
COMMUNICATES
lateral:wid infratemperolal fossa thru pterygomaxilary fissure
medial:wid nasal cavity thru spenopalatine foramen
superior:wid skull thru foramen rotandum
anterior :wid orbit thru inferior orbital fissure

hi can somebody pls post nice explanation for walls of pterygopalatine fossa, infratemporal fosssa

also, pls help with this:
infratemporal fossa and pterygopalatine fossa communicate via shpenopalatine foramen..........right??? pls correct me if i m wrong........


so, i want to know pterygomaxillary fissure connects which two fossae or cavity????

pls clear my confusion

thanks in advance
reni

 

[meebo]

d. central vein

hi,
pls ans for following questions:
1. which of the following is the lobular area of liver??
a. bile duct
b. hepatic artery
c. portal vein
d. central vein

2. mass movement occur in large intestine when food enters which of the following??
a. mouth
b. colon
c. stomach
d. pharynx
e. esophagus

 

[polydactyl]

1.What is the lateral boundary of retromandibular space?

2. If you have an abcess of a 1st premolar, what space is infected?
submental space, submandibular space, sublingual space?

3. What foramen connects the nasal cavity and the sphenoid sinus? (if this exixts)

 

[meebo]

1.What is the lateral boundary of retromandibular space?

2. If you have an abcess of a 1st premolar, what space is infected?
submental space, submandibular space, sublingual space?

3. What foramen connects the nasal cavity and the sphenoid sinus? (if this exixts)

ans for 3 )spheno ethmoidal recess
can u give the choices for other questions

 

[polydactyl]

There are no choices listed.

 

[intellidentia]

1.What is the lateral boundary of retromandibular space?

2. If you have an abcess of a 1st premolar, what space is infected?
submental space, submandibular space, sublingual space?

3. What foramen connects the nasal cavity and the sphenoid sinus? (if this exixts)

1--carotid sheath
2.submandibular
3 spheno ethmoidal recess

 

[sweet1]

1. An infection spreading by way of lymphatic syst from vermiform apendix first enter the blood stream at the
1 renal vein
2appendicular vein
3inferior veina cava
4.brachiocephalic vein.
5. internal thoracic vein.

 

[mulbery]

4.braciocephalic

1. An infection spreading by way of lymphatic syst from vermiform apendix first enter the blood stream at the
1 renal vein
2appendicular vein
3inferior veina cava
4.brachiocephalic vein.
5. internal thoracic vein.

 

[sweet1]

1. optic nerve fibre from nasal half of the retinal cross the midlineand enterthe optic tract of the opp sideby whay of the
1 optic chisma
2 lateral geniculate body
3 bipolar cell of the retina
4 branches of superiorcolliculas
5.geniculocalcanne tract
ANS: 1

2. cell bodies of proprioceptive nerve carring informationfrom PDL are located in
1.spinal nucleus of V
2.mesencephalic nuleus of V
3. mian sencory nucleus of V
ANS :2
correct me if i am wrong

 

[mulbery]

yes ,both ar correct answers

1. optic nerve fibre from nasal half of the retinal cross the midlineand enterthe optic tract of the opp sideby whay of the
1 optic chisma
2 lateral geniculate body
3 bipolar cell of the retina
4 branches of superiorcolliculas
5.geniculocalcanne tract
ANS: 1

2. cell bodies of proprioceptive nerve carring informationfrom PDL are located in
1.spinal nucleus of V
2.mesencephalic nuleus of V
3. mian sencory nucleus of V
ANS :2
correct me if i am wrong

 

[dentalcn]

yes ,both ar correct answers

Hi guys,

Do you guys know where is another long thread about part1 question?(combined one)... I am wondering if it is deleted. There is ton of valuable info inside. My friend who just took the test told me he got a lot of questions from it....maybe that's why the webmaster deleted it....

 

[sweet1]

1 A stab wound creating a pnumothorax on the left side will usually result in collapse of which of the following ..
1 . left lung
2. right lung
3. both lung
4. ribcage on both side.
5 . left lung and pericardial sac.

 

[dentalcn]

1 A stab wound creating a pnumothorax on the left side will usually result in collapse of which of the following ..
1 . left lung
2. right lung
3. both lung
4. ribcage on both side.
5 . left lung and pericardial sac.

The ans: left lung only. The two lung are seperated.

 

[angel for 32]

yes,its left lung.i had asked the same question two days back.


anyone knows these q:
which configuration of mandibular 2nd PM has the most trapezoidal shape occlusally?
y/h/u/x

which root is most likely to be narrow MD and wide FL and hae mesial and distal depressions?

in the longitudinal section of mandibular canine,where is pulp cavity thickest?

which teeth has lingual cervical line more apical then facial?

thanks

 

[swetha_dentist]

which root is most likely to be narrow MD and wide FL and hae mesial and distal depressions?
mandibular I PM?? because it contain mesial and distal developemental depressions on root
in the longitudinal section of mandibular canine,where is pulp cavity thickest?
cerviacl??
which teeth has lingual cervical line more apical then facial?
mandibular CI and LI

 

[sweet1]

1 which of the following correctly matches part of the urinary sys with its characteristic type of epithelium.
1. large collecting tubules -str columnar
2. thin limb of henle -simple columnar
3. urinary blader -str squamous
4. thick limb of henle -str cuboidal
5. bowmen's capsule - simple squamous

 

[angel for 32]

1 which of the following correctly matches part of the urinary sys with its characteristic type of epithelium.
1. large collecting tubules -str columnar
2. thin limb of henle -simple columnar
3. urinary blader -str squamous
4. thick limb of henle -str cuboidal
5. bowmen's capsule - simple squamous

bowmen's capsule - simple squamous

 

[angel for 32]

which root is most likely to be narrow MD and wide FL and hae mesial and distal depressions?
mandibular I PM?? because it contain mesial and distal developemental depressions on root
in the longitudinal section of mandibular canine,where is pulp cavity thickest?
cerviacl??
which teeth has lingual cervical line more apical then facial?
mandibular CI and LI

thanks swetha..
i dont have the answers to the q...

 

[sweet1]

1. which of the following provides immediate energy source for the transport of glucose into interstnal epithelial cell
1.NADH
2 NADPH
3. Na+ across the luminal memb
4 H+ gradient across the luminal memb

 

[dentalcn]

1. which of the following provides immediate energy source for the transport of glucose into interstnal epithelial cell
1.NADH
2 NADPH
3. Na+ across the luminal memb
4 H+ gradient across the luminal memb

First of all, I have to say this is a illegal question.
but the ans is 3.Na+ across the luminal memb
correct me if I get wrong.

 

[sweet1]

First of all, I have to say this is a illegal question.
but the ans is 3.Na+ across the luminal memb
correct me if I get wrong.

thank you very much dont take me other way.
questions are never illegal , paper can be illegal .
what u gonna do if its in ur question paper of NDBE ,w'll u gonna say it is illegal .
my friend i am just trying to solve as many ques as posible .
thanx for ur help again

 

[swetha_dentist]

thanks swetha..
i dont have the answers to the q...

yeah ..I know you dont have the answers that is the reason why you posted it i am looking for somebody to continue the discussion.
thanks

 

[swetha_dentist]

which root is most likely to be narrow MD and wide FL and hae mesial and distal depressions?
mandibular CI

 

[reni]

which root is most likely to be narrow MD and wide FL and hae mesial and distal depressions?
mandibular CI

hi fellows,

mass movement occur in large intestine when food enters which of the following??
a. mouth
b. colon
c. stomach
d. pharynx
e. esophagus
this question was left behind unanswered....pls guys answer it........
thanks in advance

 

[indian bds]

hi fellows,

mass movement occur in large intestine when food enters which of the following??
a. mouth
b. colon
c. stomach
d. pharynx
e. esophagus
this question was left behind unanswered....pls guys answer it........
thanks in advance

answer is stomach

 

[indian bds]

q
venous drainage leads the hepatic portal system of veins in which of the following organs?
testes
ovaries
kidneys
pancreas
suprarenals
[i didnt get what q means???]hepatic potal veins empty into liver and from there hepatic veing take to ivc--heart
what does this imply???

Q calcification of cartilage matrix is proceeded by which of the following events
increased production of protharmone
increased blood calcium
decreased cellular organic phosphate [is this right]
increased chondrocyte alkaline phosphatase
decrease blood magnisium level

Q which of the following connective tissue has prepodrance of ground substance over fibres?
reticular
fibrocartilage
hyaline cartilage[i think this is right]
dense irregular ct
dense regular ct
i know it has to be cartilage coz they have more amorphous ground substance over cells but nt sure fibrocartilage or hyaline ???can anyone tell

 

[dds_aspirant]

venous drainage -- dont know
calcification of cartilage --> increased chondrocyte alkaline phosphatase
which of the following connective --> hyaline cartilage

q
venous drainage leads the hepatic portal system of veins in which of the following organs?
testes
ovaries
kidneys
pancreas
suprarenals
[i didnt get what q means???]hepatic potal veins empty into liver and from there hepatic veing take to ivc--heart
what does this imply???

Q calcification of cartilage matrix is proceeded by which of the following events
increased production of protharmone
increased blood calcium
decreased cellular organic phosphate [is this right]
increased chondrocyte alkaline phosphatase
decrease blood magnisium level

Q which of the following connective tissue has prepodrance of ground substance over fibres?
reticular
fibrocartilage
hyaline cartilage[i think this is right]
dense irregular ct
dense regular ct
i know it has to be cartilage coz they have more amorphous ground substance over cells but nt sure fibrocartilage or hyaline ???can anyone tell

 

[indian bds]

venous drainage -- dont know
calcification of cartilage --> increased chondrocyte alkaline phosphatase
which of the following connective --> hyaline cartilage

thanks
another one
which nerve fibres travel throughtout the course of lingual nerve in anterior 2/3of tongue to receive sensory input?which fibres are being talked about???

 

[sam74]

hey guys ,, please advice how i can read the nervous system???? i cant read it , i dont understand it in general.

please advice

 

[missiondds]

yaaaa i have the same prob and im using a real skull to aid my reivison and it clearly looks like its ABOVE....

DEEEEEEEECKKKKKKKKSSSSSSSSSSS whyyy must u confuse me!?


ALSO, Spinal Accesory nerve.......exits thru foramen magnum or the jugular foramen?? I thought it was the foramen magnum, decks says jugular foramen.

spinal accessory nerve has 2parts, spinal part exits through formen magnum and cranial part through juglars formen.

 

[smiles2smiles]

just last 2 for today


Q:WHAT TYPE OF TISSUE R FOUND IN PULP??
loose connective tissue

where is dense Connective tissue found in oral cavity

 

[aim high]

can any one please help me with this question from 96 paper anatomy Q no 98
----the crescents or demilunes of the mucous alveoli of sublingual gland are composed of which of the following cells?
A.mucous
B.serous
C.neural
D.striated cells
E.myoepithelial cells
ans is B ..but i remember reading in decks that demilunes contain mucous..can any 1 confirm it..
thanks a lot in advance

 

[howui3]

can any one please help me with this question from 96 paper anatomy Q no 98
----the crescents or demilunes of the mucous alveoli of sublingual gland are composed of which of the following cells?
A.mucous
B.serous
C.neural
D.striated cells
E.myoepithelial cells
ans is B ..but i remember reading in decks that demilunes contain mucous..can any 1 confirm it..
thanks a lot in advance

B - serous demilunes