What does the word trochlea mean?
Definition of trochlea : an anatomical structure that is held to resemble a pulley especially : the articular surface on the medial condyle of the humerus that articulates with the ulna.
What is the trochlea in eye?
The trochlea of superior oblique is a pulley-like structure in the eye. The tendon of the superior oblique muscle passes through it. Situated on the superior nasal aspect of the frontal bone, it is the only cartilage found in the normal orbit. The word trochlea comes from the Greek word for pulley.
What does Trochlear mean in Greek?
Excerpt. An anatomical structure resembling a pully is known as a trochlea; “trochlea” is a Greek word, the English meaning of the trochlea is pully. In the ocular orbit, trochlea is a fibrous cartilaginous pully like structure on the nasal aspect of the frontal bone through which superior oblique muscle passes.
What is the trochlea foot?
The talus (/ˈteɪləs/; Latin for ankle or ankle bone), talus bone, astragalus /əˈstræɡələs/, or ankle bone is one of the group of foot bones known as the tarsus. The tarsus forms the lower part of the ankle joint. It transmits the entire weight of the body from the lower legs to the foot.
What is the trochlea in the elbow?
The humeral trochlea is an important articular surface of the elbow that is injured frequently in falls onto the upper extremity. The trochlea forms the articular surface of the medial column of the elbow and is responsible for allowing ulnohumeral flexion and extension.
Where is the trochlea located?
In the human arm, the humeral trochlea is the medial portion of the articular surface of the elbow joint which articulates with the trochlear notch on the ulna in the forearm.
What is the function of the trochlea?
In each eye, the superior oblique muscle functions as the trochlea. The trochlear nerve innervates this muscle to lift the eyes so you can look down. The nerve also enables you to move your eyes toward your nose or away from it.
Why is the trochlear nerve unique?
The trochlear nerve is unique among the cranial nerves in several respects: It is the smallest nerve in terms of the number of axons it contains. It has the greatest intracranial length. It is the only cranial nerve that exits from the dorsal (rear) aspect of the brainstem.
What is trochlea of femur?
Description. The trochlea of femur (femoral trochlea) is the cranial cartilaginous part of distal femur, for articulation with the patella fo form the femoral patellar joint. It consists of a groove bounded by the medial and a lateral ridges.
Is the trochlea anterior or posterior?
The medial portion of the articular surface of distal humerus is named the trochlea, and presents a deep depression between two well-marked borders; it is convex from before backward, concave from side to side, and occupies the anterior, lower, and posterior parts of the extremity.
What is trochlea of Talus?
The trochlea of talus is a convex articular surface for the proximal part of articulation with tibia and fibula (only with tibia in horses). The trochlea presents a sagittal groove that articulates with the sagittal ridge of cochlea of tibia.
What is the elbow trochlea?
What is the meaning of trochleae?
[L. pulley, fr. trochlea. pl. trochleae [L.] a pulley-shaped part or structure; various bony or fibrous structures through or over which tendons pass or with which other structures articulate, e.g. femoral, humeral, radial. the articular surface on the cranial aspect of the distal femur upon which the patella glides.
What is a pulley in anatomy?
An anatomical structure that resembles a pulley, especially the part of the distal end of the humerus that articulates with the ulna. The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company.
What does trotrochlea mean?
troch·lea | \\ ˈträ-klē-ə \\. : an anatomical structure that is held to resemble a pulley especially : the articular surface on the medial condyle of the humerus that articulates with the ulna.
What is another name for trochlear nerve?
Related to trochlea: trochlear nerve, coronoid process, olecranon. [trok´le-ah] (L.) a pulley-shaped part or structure; used in anatomic nomenclature to designate a bony or fibrous structure through which a tendon passes or with which other structures articulate.