EDUCATION PROGRAMS TCAR USA Retest 50% Exit and Return Later A traumatic brain injury patient's left pupil is 4 mm. The right pupil is 7 mm and is sluggishly reactive. This finding indicates compression of which cranial nerve? OCN III O CN V OCN II O CN IV Pick your confidence level answering this question to continue High Medium Low You may exit and return 2 more time-
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This condition is known as anisocoria, where the pupils are unequal in size. Show more…
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An emergency medical technician is examining a trauma victim by shining a pen light into her patient's eye. She records the reactivity of the patient's pupils as they constrict when stimulated by the light. This test supports which of the following? The patient has suffered brain damage. The patient has function of the oculomotor nerve (III). The patient has lost function of the optic nerve (II). The patient has function of the trochlear nerve (IV). A doctor asks her patient to follow the motion of her finger as she moves it up and down, left and right. Which of the following cranial nerves is not being tested? The abducens nerve (VI). The vestibulocochlear nerve (VIII). The oculomotor nerve (III). The trochlear nerve (IV). Striking the "funny bone" is actually stimulation of (or injury to) the: Radial nerve. Sciatic nerve. Ulnar nerve. Median nerve.
Madhur L.
Perform the same test with the other eye. Record your results in Table 15.4. Shine a flashlight at an angle (not directly) into your lab partner's eyes and observe the change in the diameter of the pupils. Remove the light and observe the change in pupil diameter. Record your results in Table 15.4. TABLE 15.4 Functional Assessment of Cranial Nerves for Olfaction, Vision, and Voluntary Eye Movements Cranial Nerve Test Performed Results Assessment of Nerve Function Olfactory (I) Optic (II) Oculomotor (III), trochlear (IV), and abducens (VI) Oculomotor (III) autonomic function MAKING CONNECTIONS Three cranial nerves innervate the extrinsic muscles of the eye. The greatest impairment of eye movement would result from damage to which of these cranial nerves? Explain.
Adi S.
Can You Synthesize What You've Learned? 25. If the passage of fluid is blocked at the confluence of sinuses, into which sinuses will fluid back up? This can cause pressure on the nerve, creating problems with balance and hearing loss. What nerve, other than CNVIII, would you expect to be affected by this tumor due to its close proximity? 27. When light is shined into a patient's right eye, an examiner expects to see a change in pupil diameter in both eyes. The response, called the consensual response, involves another cranial nerve sending the efferent (motor) signal out to the pupil. Which cranial nerve carries the afferent (sensory) signal to the brain? How about the efferent (motor) signal from the brain?
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