《英文msh詞典》Cranial Nerve IV Diseases
[同義詞] Cranial Nerve IV Diseases
[主題詞] Trochlear Nerve Diseases
[中文釋義] 第Ⅳ顱神經(jīng)病
[英文釋義] Diseases of the fourth cranial (trochlear) nerve or its nucleus in the midbrain. The nerve crosses as it exits the midbrain dorsally and may be injured along its course through the intracranial space,cavernous sinus,superior orbital fissure,or orbit. Clinical manifestations include weakness of the superior oblique muscle which causes vertical DIPLOPIA that is maximal when the affected eye is adducted and directed inferiorly. Head tilt may be seen as a compensatory mechanism for diplopia and rotation of the visual axis. Common etiologies include CRANIOCEREBRAL TRAUMA and INFRATENTORIAL NEOPLASMS.