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Body Atlas, Muscle Reference

Muscles

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

342 muscles

342 muscles

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 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 Peroneus Brevis musculus peroneus brevis Lower Leg The peroneus brevis is the shorter and deeper of the two peroneal muscles, running from the… Muscle Peroneus Longus musculus peroneus longus Lower Leg The peroneus longus takes a remarkable path from the lateral fibula all the way across the… Muscle Peroneus Tertius musculus peroneus tertius Lower Leg The peroneus tertius is an inconstant muscle, absent in approximately 8 to 10 percent of people,… Muscle Peroneus Tertius (Detail) musculus peroneus tertius Lower Leg Peroneus tertius is an inconstant fourth anterior compartment muscle that dorsiflexes and everts the foot. When… Muscle Pharyngeal Constrictors musculi constrictores pharyngis Neck The three pharyngeal constrictors overlap like nested plant pots to form the posterior and lateral pharyngeal… Muscle Piriformis musculus piriformis Pelvis & Hip The piriformis is a flat, pear-shaped muscle occupying the greater sciatic foramen and running from the… Muscle Piriformis (Full) musculus piriformis Pelvis & Hip The piriformis is the key external hip rotator and the primary landmark of the greater sciatic… Muscle Plantar Interossei (Foot) musculi interossei plantares pedis Foot & Ankle The three plantar interossei adduct the third, fourth, and fifth toes toward the second toe axis,… Muscle Plantaris musculus plantaris Lower Leg The plantaris is a vestigial muscle with a very short belly and an extremely long, thin… Muscle Plantaris (Full) musculus plantaris Lower Leg The plantaris has a tiny muscle belly (7-10 cm) producing the longest tendon in the body… Muscle Platysma musculus platysma Neck The platysma is a broad, thin superficial muscle of the neck covering the anterior triangle from… Muscle Platysma (Full) musculus platysma Neck The platysma is a broad flat muscle in the superficial neck, connecting the chest skin to… Muscle Popliteus musculus popliteus Knee The popliteus is a small triangular muscle at the back of the knee whose most critical… Muscle Popliteus (Full) musculus popliteus Knee The popliteus is the 'key' that unlocks the knee from full extension. In terminal extension (the… Muscle Posterior Cricoarytenoid musculus cricoarytenoideus posterior Neck The posterior cricoarytenoid is the most important intrinsic laryngeal muscle because it is the only abductor… Muscle Posterior Scalene musculus scalenus posterior Neck The posterior scalene is the smallest and most posterior of the three scalene muscles, running from… Muscle Procerus musculus procerus Head & Skull The procerus is a small pyramidal muscle at the bridge of the nose that pulls the… Muscle Pronator Quadratus musculus pronator quadratus Forearm The pronator quadratus is a flat, square muscle binding the distal radius and ulna together, acting… Muscle Pronator Teres musculus pronator teres Forearm The pronator teres is the primary pronator of the forearm, a two-headed muscle whose humeral and…

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