Tetrodotoxin (TTX) affects neurons by:

Besides the motor nuclei of cranial nerves, where are the cell bodies of the lower motor neurons located?

Which area of the amygdala responds selectively to the sight of faces?

A 36 year old female is hit by a semi while riding a motorcycle.  She is thrown 20 feet off the bike.  An emergent MRI reveals a laceration of a spinal cord at the L4 spinal cord segment.  Despite the injury, which of the following structures would most likely remain intact?

Which cells dominate, or serve as operative receptors, in dim light?

A 26 year old female presents to her primary care physician with a complaint of difficulty chewing.  She states it is extremely difficult to chew anything.  Exam demonstrates a loss of sensation on the left cheek and mandible.  An MRI of the face demonstrates a large schwannoma (tumor of Schwann cells) in the infratemporal fossa.  Which cranial nerve has been compromised?

Of the following, which symptom is most suggestive of a headache due to excessive intracranial pressure?

Which of the following would significantly decrease the speed of passive current flow in a neuron?

An 18 year old male is brought to the emergency department by his parents after exhibiting some odd behavior.  His parents are suspecting drug use and are demanding a toxicology screen.  His parents state the patient has been acting inappropriately in public and has been bringing home a different girlfriend every week.  They also note several other subjective changes in personality.   In speaking with the patient, the physician discovers the patient’s thoughts are quite disordered.  The patient’s physical exam is normal.  Besides blood work and a urine toxicology screen, the physician orders a CT scan of the head, and a large tumor is seen.  Based on the information above, where is the tumor?

A 75 year old male, on warfarin for atrial fibrillation, takes a small digger off a step stool.  He has a bruised hip, but no other issues.  The next day, he wakes up with a headache he can’t shake.  Due to his use of blood thinners, his primary care doctor sends him for a head CT.  Imaging demonstrates a brain bleed that follows the shape of the brain.  What is the most likely diagnosis?