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The function of this muscle is to rotate the head to the opposite side or obliquely rotate the head. [4] It also flexes the neck. [4] When both sides of the muscle act together, it flexes the neck and extends the head. When one side acts alone, it causes the head to rotate to the opposite side and flexes laterally to the same side (ipsilaterally).
The scalene muscles are a group of three muscles on each side of the neck, identified as the anterior, the middle, and the posterior. They are innervated by the third to the eighth cervical spinal nerves (C3-C8). The anterior and middle scalene muscles lift the first rib and bend the neck to the side they are on. The posterior scalene lifts the ...
Neck, Lateral, Right/left cervical vertebrae C3-C6 first rib: inferior thyroid artery, ascending cervical artery: ventral ramus of C5, C6: when neck is fixed, elevates first rib to aid in breathing; when rib is fixed, bends neck forward and sideways and rotates it to opposite side ?? 2 1 scalenus medius: Neck, Lateral, Right/left cervical ...
The muscles of internal rotation include: of arm/humerus at shoulder. Anterior part of the deltoid muscle [1] Subscapularis [1] Teres major [1] Latissimus dorsi [1] Pectoralis major [1] of thigh/femur at hip [2] Tensor fasciae latae; Gluteus generalis; Anterior fibers of Gluteus meralis; Adductor longus and Adductor brevis; of leg at knee [3 ...
External rotation (or extorsion or lateral rotation) is an anatomical term of motion referring to rotation away from the center of the body. The external rotator muscles include: Muscles
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In primates, the thoracic cage is wide and the scapula is rotated onto its posterior side to have the glenoid cavity face laterally. Additionally, the clavicle takes care of medial forces. In cursorial mammals (for example the horse and other quadrupeds), the scapula is hanging vertically on the side of the thorax and the clavicle is absent ...
The left side of the thorax. (Winging not illustrated but serratus anterior is labeled at left, and trapezius is labeled at upper right.) A winged scapula ( scapula alata ) is a skeletal medical condition in which the shoulder blade protrudes from a person's back in an abnormal position.