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Body Atlas, Muscle Reference

Muscles

Complete muscle reference, origins, insertions, nerve supply, actions, clinical notes, and common injuries.

62 muscles

62 muscles in Chest Clear ×

Muscle Pectoralis Major musculus pectoralis major Chest The pectoralis major is a large, fan-shaped muscle that spans the front of the upper chest,… Muscle Pectoralis Major (Clavicular Head) musculus pectoralis major pars clavicularis Chest The clavicular head of the pectoralis major is the upper portion of the fan-shaped pectoral muscle,… Muscle Pectoralis Major (Sternocostal Head) musculus pectoralis major pars sternocostalis Chest The sternocostal head is the larger and more powerful component of the pectoralis major, providing the… Muscle Pectoralis Major Detail musculus pectoralis major detail Chest The pectoralis major is the dominant anterior chest muscle with a unique twisted insertion that reverses… Muscle Pectoralis Minor musculus pectoralis minor Chest The pectoralis minor is a thin, triangular muscle that lies completely underneath the pectoralis major, connecting… Muscle Pectoralis Minor (Full) musculus pectoralis minor Chest Pectoralis minor is the key muscle producing anterior scapular tilt (inferior angle lifted away from the… Muscle Rhomboid Major musculus rhomboideus major Chest The rhomboid major is a quadrilateral muscle lying deep to the trapezius and connecting the mid-thoracic… Muscle Rhomboid Major (Full) musculus rhomboideus major Chest The rhomboid major is the larger of the two rhomboids, retracting the scapula and rotating the… Muscle Rhomboid Major Detail musculus rhomboideus major detail Chest The rhomboid major is the primary scapular retractor, drawing the scapula toward the spine. Its action… Muscle Rhomboid Minor musculus rhomboideus minor Chest The rhomboid minor is a small, cylindrical muscle directly above the rhomboid major, connecting the lower… Muscle Rhomboid Minor (Full) musculus rhomboideus minor Chest The rhomboid minor is the smaller, more superior rhomboid, inserting at the root of the scapular… Muscle Rhomboid Minor Detail musculus rhomboideus minor detail Chest The rhomboid minor is smaller and superior to rhomboid major, attaching at the root of the… Muscle Rotatores musculi rotatores Chest The rotatores are the deepest and shortest muscles of the transversospinalis group, spanning only one or… Muscle Rotatores (Thoracic) musculi rotatores thoracis Chest The rotatores are the deepest of the transversospinalis group, spanning one or two vertebral levels in… Muscle Rotatores Thoracis Breves musculi rotatores thoracis breves Chest The rotatores breves span a single thoracic vertebral level with the highest muscle spindle density in… Muscle Rotatores Thoracis Longi musculi rotatores thoracis longi Chest The rotatores longi span two vertebral levels, providing a broader proprioceptive sampling zone than the breves… Muscle Semispinalis Thoracis musculus semispinalis thoracis Chest The semispinalis thoracis spans five or more vertebral levels from the mid-thoracic transverse processes to the… Muscle Semispinalis Thoracis Detail musculus semispinalis thoracis detail Chest Semispinalis thoracis spans the greatest number of vertebral levels of all the semispinalis components, bridging from… Muscle Serratus Anterior musculus serratus anterior Chest The serratus anterior is a broad, saw-toothed muscle wrapping around the lateral chest wall and connecting… Muscle Serratus Anterior (Full) musculus serratus anterior Chest Serratus anterior is the key muscle holding the scapula against the thorax and rotating it upward… Muscle Serratus Anterior Detail musculus serratus anterior detail Chest The serratus anterior is the most important scapular stabiliser, holding the medial border of the scapula… Muscle Serratus Posterior musculus serratus posterior superior et inferior Chest The serratus posterior muscles are thin quadrilateral muscles of the intermediate back layer beneath the rhomboids… Muscle Serratus Posterior Inferior Detail musculus serratus posterior inferior detail Chest Serratus posterior inferior is a thin respiratory muscle at the thoracolumbar junction. It depresses the lower… Muscle Serratus Posterior Superior musculus serratus posterior superior Chest Serratus posterior superior is a thin, quadrilateral muscle in the upper posterior thorax deep to the…