- Concept UI
- M0328652
- Scope Note
- 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.
- Terms
-
Trochlear Nerve Diseases
Preferred Term
Term UI
T358652
Date10/12/1999
LexicalTag
NON
ThesaurusID
NLM (2000)
-
Cranial Nerve IV Diseases
Term UI
T370935
Date10/12/1999
LexicalTag
NON
ThesaurusID
NLM (2000)
-
Fourth Cranial Nerve Diseases
Term UI
T370936
Date10/12/1999
LexicalTag
NON
ThesaurusID
NLM (2000)
-
Trochlear Nerve Disorders
Term UI
T370937
Date10/12/1999
LexicalTag
NON
ThesaurusID
NLM (2000)
-
Trochlear Neuropathy
Term UI
T370938
Date10/12/1999
LexicalTag
NON
ThesaurusID
NLM (2000)