Trochlea of superior oblique
(Redirected from Trochlea musculi obliqui superioris bulbi)
The trochlea of superior oblique is a structure in the human eye that plays a crucial role in the movement of the superior oblique muscle. This small, cartilaginous loop is located in the upper, inner part of the orbit, near the frontal bone.
Anatomy[edit | edit source]
The trochlea is a pulley-like structure through which the tendon of the superior oblique muscle passes. The superior oblique muscle originates from the sphenoid bone, specifically from the annulus of Zinn, and travels forward to the trochlea. After passing through the trochlea, the tendon of the superior oblique muscle changes direction and inserts onto the sclera of the eyeball.
Function[edit | edit source]
The primary function of the trochlea is to act as a pulley for the superior oblique muscle, allowing it to exert its action on the eye. The superior oblique muscle is responsible for intorsion, depression, and abduction of the eye. The trochlea ensures that the force generated by the muscle is appropriately directed to achieve these movements.
Clinical Significance[edit | edit source]
Dysfunction of the trochlea or the superior oblique muscle can lead to a condition known as superior oblique palsy. This condition can result in diplopia (double vision) and difficulty in moving the eye downward, particularly when looking towards the nose. Diagnosis and treatment of superior oblique palsy often involve ophthalmologic evaluation and may require surgical intervention.
Related Structures[edit | edit source]
See Also[edit | edit source]
References[edit | edit source]
External Links[edit | edit source]
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