What is Tillaux spiral?

“Tillaux’ spiral”: An imaginary line connecting the insertions of the eye’s recti muscles.

What is Intorsion of the eye?

: inward rotation (as of a body part) about an axis or a fixed point especially : rotation of the eye around its anteroposterior axis so that the upper part moves toward the nose — compare extorsion.

Which is the strongest extraocular muscle?

medial rectus
The medial rectus had the strongest trend between increasing diameter and motility restriction, followed by the inferior rectus and the superior muscle group (comprised of the superior rectus and levator palpebrae superioris).

Where do extraocular muscles attach?

EXTRAOCULAR MUSCLES: These muscles originate in the eye socket (orbit) and work to move the eye up, down, side to side, and rotate the eye. The superior rectus is an extraocular muscle that attaches to the top of the eye.

What is the superior oblique muscle?

The superior oblique is a fusiform (spindle-shaped) muscle belonging to the extraocular group of muscles. It originates near the nose. This muscle’s movement of the eye downward is most effective when the eye is abducted.

What are the 6 cardinal fields of gaze?

You are now familiar with the 6 cardinal directions of gaze (right/up; right; right/down; left/up; left; left/down), as well as the remainder of the yoked eye movements (straight up; straight down; convergence).

What are the two main refractive bodies in the eye?

The cornea and the lens are the eye’s most important refractive structures.

Which is the thinnest extraocular muscles?

The superior oblique muscle is the longest and thinnest of the extraocular muscles because of its long (2.5 cm) tendon of insertion.

What are the six cardinal fields of gaze?

Why does superior oblique depress the eye?

The superior oblique muscle, therefore, originates functionally from the trochlea at the superior medial orbital rim and inserts on the top of the globe behind its equator. When the eye is in adduction, this muscle exerts a more or less direct downward pull and depresses the eye.

What is the cardinal fields test?

The cover/uncover test is used to determine misalignment of the eye. The function of cranial nerves III, IV, VI and eye movement can be assessed with the cardinal fields of gaze. How do I assess visual fields? You will test the nasal, temporal, superior, inferior, and oblique angles in the patient’s field of vision.

Which is the best definition of the spiral of Tillaux?

spiral of Tillaux – an imaginary line connecting the insertions of the recti muscles of the eye.

What was the purpose of the Tillaux manoeuvre?

“Tillaux’ manoeuvre”: Procedure for demonstrating the presence of a breast tumour adhering to the pectoralis major muscle. “Tillaux’ sign”: The presence of a resonant area between the pubic bone and a tumor is an indication of a mesenteric tumor. “Tillaux’ spiral”: An imaginary line connecting the insertions of the eye’s recti muscles.

When does a Tillaux-Chaput avulsion fracture occur?

Tillaux fracture. A Tillaux fracture (or a Tillaux-Chaput avulsion fracture) is a Salter–Harris type III fracture through the anterolateral aspect of the distal tibial epiphysis. It occurs in older adolescents between the ages of 12 and 15 when the medial epiphysis had closed but before the lateral side has done so,…

How to tell if you have a Tillaux fracture?

Tillaux fracture 1 Epidemiology. It occurs in older children and adolescents when the medial aspect of the distal tibial growth plate has started to fuse. 2 Pathology. The fracture commonly results from an abduction-external rotation mechanism. 3 Radiographic features. 4 Treatment and prognosis. 5 History and etymology.