Lombard's Paradox

These flashcards cover key concepts related to Lombard's Paradox, including muscle functions, contraction types, and anatomical terms.

Lombard's Paradox

A phenomenon where biarticular muscles exhibit varying moment arms at different joints, affecting their function.

Moment Arm

The perpendicular distance from the line of action of a force to the axis of rotation.

Hip Extensors

Muscles, such as hamstrings, that primarily function to extend the hip joint.

Knee Extensors

Muscles, such as rectus femoris, that primarily function to extend the knee joint.

Biarticular Muscles

Muscles that cross two joints and can influence movement at both.

Isometric Contraction

A type of muscle contraction where the muscle exerts force without changing length.

Concentric Contraction

A type of muscle contraction where the muscle shortens while generating force.

Supraspinatus

A muscle located in the shoulder that helps lift the arm.

Glenoid Cavity

The socket in the scapula that receives the head of the humerus.

Elbow Flexor

Muscles, like biceps brachii, that primarily flex the elbow joint.

Shoulder Adductor

Muscles that bring the arm closer to the body, such as the triceps when acting at the shoulder.