Kinesiology and Biomechanics: Elbow Complex

Flashcards covering key concepts related to the structure and function of the elbow complex in kinesiology and biomechanics.

Elbow Complex

A joint complex that positions the hand in space, lengthens the arm for reaching, and shortens the arm to bring objects to the body.

Carrying Angle

The angle created by the oblique line of the elbow joint's flexion and extension axis, typically around 15°.

Modified Hinge Joint

A type of joint classification for the humeroulnar and humeroradial joints, allowing flexion, extension, and a small amount of rotation.

Valgus

A condition where the distal bone of the joint is farther away from the body.

Varus

A condition where the distal bone of the joint is closer to the body.

Law of Parsimony

A principle stating that the nervous system recruits the fewest muscle fibers necessary to perform a task.

Supination

Rotational movement of the forearm in which the palm faces up, typically occurring at an angle of 85° to 90°.

Pronation

Rotational movement of the forearm in which the palm faces down, typically occurring at an angle of 75° to 80°.

Elbow Flexors

Muscles that decrease the angle between the forearm and arm, including biceps brachii, brachialis, and brachioradialis.

Elbow Extensors

Muscles that increase the angle between the forearm and arm, notably the triceps brachii and anconeus.

Radial Collateral Ligament

Provides lateral stability to the elbow joint and counters varus stresses.

Ulnar Collateral Ligament

Provides medial stability to the elbow joint and counters valgus stresses.