List of movements of the human body

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Human anatomy
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See also Table of epithelia of human organs Anatomical terminology Index of anatomy articles Outline of anatomy Cell types

The list below describes such skeletal movements as normally are possible in particular joints of the human body. Other animals have different degrees of movement at their respective joints; this is because of differences in positions of muscles and because structures peculiar to the bodies of humans and other species block motions unsuited to their anatomies.

Certain movements, such as of the carpal bones of the hand or the tarsal bones of the foot, are difficult to classify. In most fields of medical practice there is little need of terminology for such movements; the terms occur mainly in the vocabulary of practitioners of hand surgery or other branches of orthopedic surgery.

Arm and shoulder-girdle

SC and AC joint

Shoulder

The major muscles involved in retraction include the rhomboid major muscle, rhomboid minor muscle and trapezius muscle,^[2][3] whereas the major muscles involved in protraction include the serratus anterior and pectoralis minor muscles.^[4][5]

Elbow

Wrist and fingers

Neck

Spine

Lower limb

Feet

The muscles tibialis anterior and tibialis posterior invert the foot. Some sources also state that the triceps surae and extensor hallucis longus invert.^[6]:123 Inversion occurs at the subtalar joint and transverse tarsal joint.^[7]

Eversion of the foot occurs at the subtalar joint. The muscles involved in this include Fibularis longus and fibularis brevis, which are innervated by the superficial fibular nerve. Some sources also state that the fibularis tertius everts.^[6]:108

• 
  Peroneus longus and peroneus brevis (centre left), the primary muscles involved in eversion
• 
  Tibialis anterior and posterior (centre top), the primary muscles involved in inversion

Dorsiflexion of the foot: The muscles involved include those of the Anterior compartment of leg, specifically tibialis anterior muscle, extensor hallucis longus muscle, extensor digitorum longus muscle, and peroneus tertius. The range of motion for dorsiflexion indicated in the literature varies from 12.2^[8] to 18^[9] degrees.^[10] Foot drop is a condition, that occurs when dorsiflexion is difficult for an individual who is walking.

Plantarflexion of the foot: Primary muscles for plantar flexion are situated in the Posterior compartment of leg, namely the superficial Gastrocnemius, Soleus and Plantaris (only weak participation), and the deep muscles Flexor hallucis longus, Flexor digitorum longus and Tibialis posterior. Muscles in the Lateral compartment of leg also weakly participate, namely the Fibularis longus and Fibularis brevis muscles. Those in the lateral compartment only have weak participation in plantar flexion though. The range of motion for plantar flexion is usually indicated in the literature as 30° to 40°, but sometimes also 50°. The nerves are primarily from the sacral spinal cord roots S1 and S2. Compression of S1 roots may result in weakness in plantarflexion; these nerves run from the lower back to the bottom of the foot.

Pronation at the forearm is a rotational movement at the radioulnar joint, or of the foot at the subtalar and talocalcaneonavicular joints.^[11][12] For the forearm, when standing in the anatomical position, pronation will move the palm of the hand from an anterior-facing position to a posterior-facing position without an associated movement at the shoulder joint). This corresponds to a counterclockwise twist for the right forearm and a clockwise twist for the left (when viewed superiorly). In the forearm, this action is performed by pronator quadratus and pronator teres muscle. Brachioradialis puts the forearm into a midpronated/supinated position from either full pronation or supination. For the foot, pronation will cause the sole of the foot to face more laterally than when standing in the anatomical position.

Pronation of the foot is a compound movement that combines abduction, eversion, and dorsiflexion. Regarding posture, a pronated foot is one in which the heel bone angles inward and the arch tends to collapse. Pronation is the motion of the inner and outer ball of the foot with the heel bone.^[13] One is said to be "knock-kneed" if one has overly pronated feet. It flattens the arch as the foot strikes the ground in order to absorb shock when the heel hits the ground, and to assist in balance during mid-stance. If habits develop, this action can lead to foot pain as well as knee pain, shin splints, achilles tendinitis, posterior tibial tendinitis, piriformis syndrome, and plantar fasciitis..

References