Hello friends how are you today we are going to talk about the superior oblique, do you know that the superior oblique is a fusiform (spindle-shaped) muscle which is related to the outer group of our muscles. It passes through our nose. Let us tell you that along with other external muscles, it plays the role of controlling the movements of the eyes.
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Superior oblique muscle
You find that its primary, secondary, and tertiary actions are inward rotation (looking up the nose), depressurization (looking down), and abduction (looking away from the nose), respectively. The downward movement of the eye of this muscle may be most effective when the human eye is abducted. The downward movement of your eye is also supported by the lateral rectus, another external muscle.
Another important role of the superior oblique muscle is usually to provide visual stability. It counteracts the tendency of the eye to rotate involuntarily when you look down or up. It can also cause inward twisting, which keeps your eye position toward the midline of the face.
Let us tell you that the fourth cranial (trochlear) nerve supplies just this muscle and it supports your eye’s ability to press down. People with fourth nerve palsy or – which can be from birth or as a result of trauma – have impaired downward movement, may feel as if their eye is floating upwards. This may result in blurred or double vision. Fourth nerve palsy can be treated with glasses, surgery, or it may even go away on its own with time.