When you climb stairs or look down to read a paper, you use your trochlear nerve and superior oblique muscle. Trochlea. This cartilaginous tissue holds the tendon of the superior oblique muscle.

To quantitatively determine the size and contractility of the superior oblique (SO) muscle in primary SO overaction (PSOOA). A prospective, observational study was conducted on 12 patients with ...

In 1906 Duane reported the first case with uniocular rotatory nystagmus involving the superior oblique muscle. 1 In 1970 Hoyt and Keane termed SOM as an acquired abnormality in the innervation of ...