Mr Johnson, much to his parents dismay, has decided to quitcollege an...

Mr. Johnson, much to his parentsâ€™ dismay, has decided to quit college and to become a professional...

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Medical Sciences

Mr. Johnson, much to his parentsâ€™ dismay, has decided to quitcollege and to become a
professional skateboarder. In order to bring attention to himself,Mr. Johnson decided to film
himself performing a trick and then to submit it to a cable channelprogram featuring various
â€˜daredevilsâ€™. Mr. Johnson planned to ride a stair railing at thelocal strip mall. Unfortunately the
trick failed and Mr. Johnson suffered fractures in his frontal boneas well as several facial bones
making up the orbit of his left eye. After trauma care and a bonereconstruction, Mr. Johnson exhibited external strabismus (eyerotates laterally), he could not focus on objects with hisleft
eye and his left pupil did not respond to changes in lightintensity. A study of the activity of the
extrinsic muscles of his left eye found only the superior obliqueand the lateral rectus muscles
were still functional. Further investigation found that the leftsuperior orbital fissure was
compressing one of the cranial nerve associated with the eye.

Answer the following questions:
1. What is the Cranial Nerve Damaged?
2. Function of This Nerve
3. How does the cranial nerves damage relate to the patientssymptoms?

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Case history Mr Johnson has suffered fracture is his frontal bone as well as facial bones making up the orbit of his left eye After reconstruction his eye has rotated laterally and he is unable to focus on objects through his left eyes as well as his left eye is not responding to changes in light intensity 1 The above clinical history indicates that the left oculomotor nerve which is the 3rd cranial nerve See Answer

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