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Flexion and extension are movements that affect the angle between two parts of the body. These terms come from the Latin words with the same meaning. [a] Flexion is a bending movement that decreases the angle between a segment and its proximal segment. [9] For example, bending the elbow, or clenching a hand into a fist, are examples of flexion ...
In anatomy, flexor is a muscle that contracts to perform flexion (from the Latin verb flectere, to bend), [1] a movement that decreases the angle between the bones converging at a joint. For example, one's elbow joint flexes when one brings their hand closer to the shoulder, thus decreasing the angle between the upper arm and the forearm.
In anatomy, extension is a movement of a joint that increases the angle between two bones or body surfaces at a joint. Extension usually results in straightening of the bones or body surfaces involved. For example, extension is produced by extending the flexed (bent) elbow.
A muscle that fixes or holds a bone so that the agonist can carry out the intended movement is said to have a neutralizing action. A good famous example of this are the hamstrings; the semitendinosus and semimembranosus muscles perform knee flexion and knee internal rotation whereas the biceps femoris carries out knee flexion and knee external ...
The gross anatomy of a muscle is the most important indicator of its role in the body. One particularly important aspect of gross anatomy of muscles is pennation or lack thereof. In most muscles, all the fibers are oriented in the same direction, running in a line from the origin to the insertion.
knee extension; hip flexion: hamstring: 2 1 vastus lateralis: Lower limb, Thigh, Anterior compartment greater trochanter, intertrochanteric line, and linea aspera of femur: patella and tibial tuberosity via patellar tendon: femoral artery: femoral nerve: extends knee: hamstring: 2 1 vastus intermedius: Lower limb, Thigh, Anterior compartment ...
Flexion and extension of the shoulder joint in the (sagittal plane). Flexion is carried out by the anterior fibres of the deltoid, pectoralis major and the coracobrachialis. Extension is carried out by the latissimus dorsi and posterior fibres of the deltoid. Abduction and adduction of the shoulder (frontal plane).
An oversplit by former Olympic gymnast Irina Tchachina Stretching cat. Flexibility is the anatomical range of movement in a joint or series of joints, and length in muscles that cross the joints to induce a bending movement or motion.