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Anatomy Exam (ACTUAL EXAM ) Questions and Answers (Solved)
- The dendrites extend from what part of the neuron?
Answer: The cell body
- Axons conduct nerve impulses in what direction?
Answer: Away from the cell body towards the nerve terminals and synapses
- Where is the anatomic location of the Primary Somatosensory Cortex?
Answer: -Postcentral gyrus of the parietal lobe just posterior to the primary motor cotex.
- What are the three regions of the brainstem?
Answer: Midbrain, Pons, and Medulla
- What part of the Central Nervous System (CNS) controls vital life support systems (BP,
respiration, cardiovascular control)?
Answer: The brainstem
- The Medulla contains which cranial nerves?
Answer: VIII, IX, X, XI, XII
- At what level of the brianstem does the medial leminiscus cross over (decussate)?
Answer: Medulla
- Is the medial lemniscal tract a sensory or motor tract?
Answer: Sensory
- Nucleus Gracilis receives sensory information from the upper or lower extremities?
Answer: Lower extremities
- What are the synapses of the dorsal column pathway (medial lemniscal tract) on the way
to the sensory cortex?Answer: Peripheral nerves ascend to spinal cord via dorsal root, synapse at medulla in the nucleus gracilis (lower) and nucleus cuneatus (upper) nerve impulses decussates as it leaves medulla, a synapse occurs at the thalamus and goes to sensory cortex
- How many cervical vertebrae are there?
Answer: 7
- Is the lateral corticospinal tract a sensory or a motor tract?
Answer: Motor 1 / 2
13. Name the major arterial supply to the brain:
Answer: 2 internal carotid arteries (ICA) and 2 vertebral arteries
- ICA divides into?
Answer: Anterior Cerebral Artery (ACA) and Middle Cerebral Artery (MCA)
- Does the ACA or the MCA supply the upper extremities?
Answer: MCA
- What is the major arterial supply to the brainstem?
Answer: Vertebrobasilar distribution
- What is the function of the Circle of Willis?
Answer: The Circle of Willis provides alternate routes for blood to reach the brain in the event of an occluded carotid or vertebral artery
- What is the blood supply to the spinal cord?
Answer: Branches of vertebral arteries: posterior and anterior spinal arteries and the radicular arteries.
- What is the Artery of Adamkiewicz?
Answer: The largest radicular artery that joins the anterior spinal artery between T8-T12. It is the major blood supply to the lower two-thirds of the anterior spinal artery.
- Which cranial nerve innervates the extrocular muscles?
Answer: CN VI Abducens
- What two cranial nerves are typically monitored during a vestibular schwannoma?
Answer: CN VIII (vestibulocochlear) and CN VII (facial)
- What muscles are typically recorded from to monitor the facial nerve EMG?
Answer: Orbicularis oculi and orbicularis oris
23. Direct stimulation of cranial nerve V will result in:
Answer: Jaw movement from masseter muscles
- What cranial nerves are typically monitored during a Microvascular De- compression of
CN VII?
Answer: Typically CN VII and CN VIII. Hearing loss is a common complication of the surgery
- Dorsal roots contain sensory or motor fibers?
Answer: Sensory
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