Thanks guys, I'm glad you appreciate it and I am able to provide some insight in to our field. In a lot of places, student exposure to the neurosurgery department remains low which leaves a lot of doctors out there not entirely sure what we do.
We do a lot of work with different types of implants. The most common are ventricular shunts that is basically a tube from the ventricle in the brain to somewhere else in the body (abdomen, lung, heart) to allow for the pressure from extra CSF to be relieved. Other common implants are intrathecal pumps and deep brain, spinal cord, or vagal nerve stimulators Pumps are for pain or spasticity and contain a narcotic and or baclofen. The pump itself sits in the subcutaneous abdominal fat and the catheter enters the spinal column/thecal sac in the lumbar spine. Deep brain stimulators have the pulse generator in the infraclavicular region and the stimulator itself is placed in a specific target in the brain. Deep brain stimulation helps with tremor, parkinsons, and several other indications. Vagal nerve stimulators are also infraclavicular, though sometimes they are placed deep to the breast on the supra pectorial fascia for cosmesis. The leads sit on the vagal nerve and the generator is used to prevent seizures. Spinal cord stimulators are typically placed in the thoracic spine and are generally for persistent back pain. The generator is either in the "wallet pocket" over the gluteal muscle (think where you would put a wallet in a pair of pants) or in the anterior subcutaneous fat like a intrathecal pump.
We also implant hardware that doesn't function such as screws and rods for spinal surgery, screws and plates for cranial fixation, and prosthetic bone pieces for cranial defects.