A lesion of the trochlear nerve prevents activation of the superior oblique muscle. What type of movement would this prevent?
A. Ipsilateral eye cannot look downward and inward
B. Ipsilateral eye cannot look upward and outward
C. Ipsilateral eye cannot look laterally
D. All of the above
ANS: A
Rationale: A lesion of the trochlear nerve prevents activation of the superior oblique muscle; consequently, the ipsilateral eye cannot look downward and inward. People with lesions of the trochlear nerve complain of double vision, difficulty reading, and visual problems when descending stairs.
You might also like to view...
The cocaine "high" lasts for
A. 1-5 minutes. B. 2-10 minutes. C. 5-20 minutes. D. up to 1 hour.
Telemetry involves all of the following EXCEPT ________
A) it monitors a patient's heart rate B) the patient wears electrodes in the coronary care unit C) the nurse watches the patient's heart rhythm D) it uses radiopaque contrast dye to outline a blood vessel
Thalassemia is a ________ blood disorder.
Fill in the blank(s) with the appropriate word(s).
Plan for treatment:
a. protocal b. protokol c. protocol