| Morphology and Distribution of Motorneurons of Oculomotor Nucleus and Medial Longitudinal Fasciculus in the Cat. |
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J S Lim, J H Yoo, D K Kim |
1Department of Ophthalmology, Inha Hospital, The Inha University Medical College.
2Department of Ophthalmology, Sungnam Hospital, Sungnam, Korea. |
| 고양이에서 내직근을 지배하는 동안신경핵의 운동신경원과 내측종속의 분포 및 형태학적인 연구 |
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임정수(Jeong Soo Lim),유중하(Joong Ha Yoo),김도균(Do Kyun Kim) |
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| Abstract |
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The oculomotor nucleus and medial longitudinal fasciculus innervating medial rectus muscle were studied in 8 cats to evaluate the cell size and location of subnuclei by means of 1] horseradish peroxidase[HRP] injection directly to the belly of medial rectus muscle, 2] HRP injection to a transected nerve stump of medial rectus branch of the oculomotor nerve. The observed numbers and cell size of five major labelled sites were 1] Edinger-Westphal nucleus[10~15 cells, 15+/-3 micrometer], 2] dorsolateral subnuclei[895 cells, 50+/-2 micrometer], 3] ventral subnuclei[996 cells, 50+/-2 micrometer & 29+/-2 micrometer], 4] interoculomotor subnuclei[10~15 cells, 30+/-2 micrometer], and 5] medial longitudinal fasciculus[152 cells, 50+/-2 micrometer]. The medial longitudinal fasciculus plays an important role in movements of extraocular muscles, especially of medial rectus muscle and may subserve horizontal conjugate deviation and convergence. |
| Key Words:
Horseradish peroxidase;Medial longitudinal fasciculus;Medial rectus muscle;Oculomotor nucleus |
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