Harold W . Brown first described the disorder in 1950 and initially named it the " superior oblique tendon sheath syndrome ".
12.
The real cause was a tight or short superior oblique tendon; studies have confirmed this and have labeled the tendon inelastic.
13.
The clinical consequences of weakness in the superior oblique ( caused, for example, by fourth nerve palsies ) are discussed below.
14.
He concluded that all of these features of Brown syndrome were due to the shortening or tightening of the anterior superior oblique tendon.
15.
CN III ), which may affect the parasympathetic input to the superior oblique ( innervated by trochlear nerve a . k . a.
16.
An exception is the trochlear nucleus in the brainstem, which innervates the superior oblique muscle of the eye on the opposite side of the face.
17.
When the eye is in the primary position ( looking straight ahead ), contraction of the superior oblique produces depression and intorsion in roughly equal amounts.
18.
The depressing action of superior oblique ( making the eye look down towards the mouth ) is most effective when the eye is in an adducted position.
19.
Alfred Bielschowsky's head tilt test is a test for palsy of the superior oblique muscle caused by damage to cranial nerve IV ( trochlear nerve ).
20.
Therefore, during neurological examinations, the superior oblique is tested by having the patient look inwards and downwards, testing only the depressing action of the muscle.
