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Disease Trochlear Nerve Diseases

Name Trochlear Nerve Diseases
Synonyms Cranial Nerve IV Diseases | Fourth Cranial Nerve Diseases | Fourth Cranial Nerve Palsy | Fourth Nerve Palsies | Fourth Nerve Palsy | Myokymias, Superior Oblique | Myokymia, Superior Oblique | Neurogenic Superior Oblique Palsy | Neuropathies, Trochlear | Neuropathy, Trochlear | Palsies, Fourth Nerve | Palsies, Trochlear Nerve | Palsy, Fourth Nerve | Palsy, Trochlear Nerve | Superior Oblique Myokymia | Superior Oblique Myokymias | Superior Oblique Palsy, Neurogenic | Trochlear Nerve Disease | Trochlear Nerve Disorder | Trochlear Nerve Disorders | Trochlear Nerve Palsies | Trochlear Nerve Palsy | Trochlear Neuropathies | Trochlear Neuropathy
Definition 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.
Categories Nervous system disease
MeSH® ID D020432
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Top ↑ Ancestors

DiseasesNervous System Diseases Has associated chemicals Has associated genes Has associated exposure references Cranial Nerve Diseases Has associated chemicals Has associated genes Has associated exposure references Trochlear Nerve Diseases Has associated chemicals Has associated genes

Top ↑ Descendants

Trochlear Nerve Diseases Has associated chemicals Has associated genes
  Fourth Cranial Nerve Palsy, Familial Congenital