The shape of the trochlea.
Dissections and serial sections of human orbits showed the shape of the trochlea to be more complex than has been previously described. A grooved cartilaginous flange extends posterolaterally from the front of the trochlea, guiding the reflected portion of the superior oblique tendon.
D006801:Humans; D009801:Oculomotor Muscles / Q000033:anatomy & histology*; D009915:Orbit / Q000033:anatomy & histology; D013710:Tendons / Q000033:anatomy & histology*