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Flashcards in BLOOD SUPPLY Deck (11)
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1. A 50-year-old hypertensive woman com- plains of numbness and weakness in her left leg and foot. Occlusion of which of the following vessels may account for this complaint?
(A) Anterior choroidal artery
(B) Anterior cerebral artery
(C) Interior carotid artery
(D) Middle cerebral artery
(E) Posterior artery

1-B. The anterior cerebral artery perfuses the paracentral lobule, which represents the motor and sensory strips of the leg and foot areas.

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2. A 15-year-old boy is hit on the temple with a baseball and becomes unconscious. After about 10 minutes, he regains consciousness, but he soon becomes lethargic, and over the next 2 hours, he becomes stuporous. His pupils are unequal. Intracranial hemorrhage is sus- pected. Which of the following vessels is most likely to be the source of the hemorrhage?
(A) Anterior cerebral artery
(B) Anterior communicating artery
(C) Basilar artery
(D) Middle cerebral artery
(E) Middle meningeal artery

2-E. Laceration of the middle meningeal artery gives rise to an epidural hematoma. Classic signs of an epidural hematoma are skull trauma, usually with fracture, and sequential progression from unconsciousness to lucidity to progressive coma to death due to transtentorial herniation with ipsilateral third palsy.

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3. The optic chiasm is supplied by all of the following arteries EXCEPT the
(A) internal carotid artery
(B) anterior communicating artery
(C) anterior choroidal artery
(D) posterior communicating artery
(E) anterior cerebral artery

3-C. The anterior choroidal artery lies outside of the circle of Willis and does not supply the optic chiasm.

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4. All of the following statements concerning the internal carotid artery are correct EXCEPT
(A) it enters the skull via the sphenoid bone
(B) it lies within the cavernous sinus
(C) it gives off direct branches to the internal capsule
(D) it gives rise to the anterior choroidal artery
(E) it gives rise to the posterior communicating artery

4-A. The internal carotid artery enters the skull via the carotid canal of the temporal bone.

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5. The cavernous sinus and its lateral wall contain all of the following structures EXCEPT the
(A) carotid siphon
(B) oculomotor, abducent, and trochlear nerves
(C) ophthalmic and maxillary nerves
(D) optic nerve
(E) postganglionic sympathetic fibers

5-D. The cavernous sinus and its lateral wall contain the carotid siphon; the oculomotor (CN III), abducent (CN VI), and trochlear nerves (CN IV); a sympathetic plexus; and the ophthalmic and maxillary divisions of the trigeminal nerve (CN V). The optic nerve (CN II) and ophthalmic artery reach the orbit via the optic canal.

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6. All of the following statements concerning the middle meningeal artery are correct EXCEPT
(A) it is usually a branch of the maxillary artery
(B) it enters the cranium through the foramen spinosum
(C) laceration results in epidural hemorrhage
(D) it supplies most of the dura of the calvarium
(E) it supplies the dura of the posterior cra-nial fossa

6-E. The middle meningeal artery usually is a branch of the maxillary artery, which enters the cranium via the foramen spinosum and supplies most of the dura of the calvarium. Laceration of this artery leads to epidural hemorrhage (hematoma). The artery and its accompanying dural veins lie between the periosteal and meningeal layers of the dura. The dura of the posterior fossa is supplied by branches of the ascending pharyngeal, vertebral, and occipital arteries (posterior meningeal arteries).

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Questions 7-11
The response options for items 7-11 are the same. You will be required to select one answer for each item in the set.
(A) Posterior cerebral artery
(B) Superior cerebellar artery
(C) Anterior inferior cerebellar artery
(D) Posterior inferior cerebellar artery
(E) Anterior spinal artery


7. Usually gives rise to the artery that sup-plies the inner ear

7-C. The anterior inferior cerebellar artery usually gives rise to the labyrinthine artery, which supplies the structures of the inner ear (i.e., the cochlea and vestibular apparatus).

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Questions 7-11
The response options for items 7-11 are the same. You will be required to select one answer for each item in the set.
(A) Posterior cerebral artery
(B) Superior cerebellar artery
(C) Anterior inferior cerebellar artery
(D) Posterior inferior cerebellar artery
(E) Anterior spinal artery

8. Supplies the facial nucleus and the spinal trigeminal nucleus and tract

8-C. The facial nucleus and the spinal trigeminal nucleus and tract are supplied by the anterior inferior cerebellar artery.

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Questions 7-11
The response options for items 7-11 are the same. You will be required to select one answer for each item in the set.
(A) Posterior cerebral artery
(B) Superior cerebellar artery
(C) Anterior inferior cerebellar artery
(D) Posterior inferior cerebellar artery
(E) Anterior spinal artery

9. Is the terminal branch of the basilar artery

9-A. The posterior cerebral artery is the terminal branch of the basilar artery.

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Questions 7-11
The response options for items 7-11 are the same. You will be required to select one answer for each item in the set.
(A) Posterior cerebral artery
(B) Superior cerebellar artery
(C) Anterior inferior cerebellar artery
(D) Posterior inferior cerebellar artery
(E) Anterior spinal artery

10. Supplies the deep cerebellar nuclei

10-B. The superior cerebellar artery supplies the superior surface of the cerebellum and the cerebellar nuclei (dentate nucleus).

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Questions 7-11
The response options for items 7-11 are the same. You will be required to select one answer for each item in the set.
(A) Posterior cerebral artery
(B) Superior cerebellar artery
(C) Anterior inferior cerebellar artery
(D) Posterior inferior cerebellar artery
(E) Anterior spinal artery

11. Supplies the nucleus ambiguus

11-D. The posterior inferior cerebellar artery supplies the dorsolateral medullary field, including the nucleus ambiguus.