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Which of the following is the primary source of norepinephrine in the brain?
You are evaluating a patient in the clinic for loss of light touch, pain, and body position in the left upper and lower limbs. Within which of the following thalamic nuclei do these signals synapse to third-order neurons?
Paraphasic and semantic errors in speech can occur secondary to a lesion in which of the following regions?
A 75-year-old woman with HTN presents with sudden memory deficits and a change in emotional regulation. She is found to have a lacunar infarct, and you feel a disconnection of the Papez circuit may explain her symptoms. Which of the following is not considered a part of the Papez circuit?
A 45-year-old female presents as a trauma for an unhelmeted motorcycle accident. She has sustained significant blunt head trauma, and CTH shows hydrocephalus caused by edematous mass effect compressing the fourth ventricle. Which of the following shows the correct directional flow of CSF in a normal individual?
Identify the structures labeled in the image below:
An 87-year-old male presents with a 2-year history of worsening cognitive decline and speech difficulties. Brain MRI reveals multiple chronic cerebral infarcts. The neurological exam reveals adequate comprehension and fluency but naming was impaired. What is the most likely diagnosis?
Which of the following structures is not primarily involved in the processing and relay of auditory information in the central nervous system?
Which of the following occurs at point “4” on this diagram of an action potential?
A 55-year-old male presents with progressive worsening new headache over several months. He did not wish to seek medical attention but now presents because his family reports his facial expressions “look different”. On exam, he has impaired upgaze, light near dissociation, and convergence retraction nystagmus. An MRI is done and shows a lesion. Where is the lesion likely located?
Which of the following is the first branch of the internal carotid artery once it enters the skull?
Which of the following anatomic structures is responsible for the perception of superficial light touch?
Which of the following areas, if selectively lesioned, would cause an error with voluntary vertical saccades with spared horizontal saccades and sparred occulocephalic vertical reflex?
Which of the following can not cross the blood-brain barrier via channel-mediated transport?
Which of the following nuclei of the hypothalamus is involved in temperature regulation?