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Body Atlas, Muscle Reference

Muscles

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

676 muscles

676 muscles

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 musculus serratus posterior inferior Lower Back The serratus posterior inferior counteracts the tendency of the diaphragm to pull the lower ribs inward… 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… Muscle Short Head Biceps Femoris Detail caput breve m. bicipitis femoris detail Thigh The short head is unique among the hamstrings in being innervated by the common peroneal nerve,… Muscle Short Head of Biceps Femoris musculus biceps femoris caput breve Thigh The short head of the biceps femoris is the only hamstring not arising from the ischial… Muscle Soleus musculus soleus Lower Leg The soleus lies deep to the gastrocnemius in the posterior calf, constituting the largest portion of… Muscle Soleus Detail musculus soleus detail Lower Leg The soleus is predominantly slow-twitch (type I), making it the primary postural plantarflexor. Unlike gastrocnemius, it… Muscle Sphincter of Oddi musculus sphincter ampullae hepatopancreaticae (Oddi) Abdomen The sphincter of Oddi is a complex smooth muscle valve at the ampulla of Vater regulating… Muscle Sphincter Pupillae musculus sphincter pupillae Head & Skull The sphincter pupillae is a circular smooth muscle ring 0.75 mm wide situated in the posterior… Muscle Sphincter Urethrovaginalis musculus sphincter urethrovaginalis Pelvis & Hip The sphincter urethrovaginalis is a female-specific striated muscle forming the most distal component of the external… Muscle Spinalis musculus spinalis Lower Back The spinalis is the most medial column of the erector spinae, running from spinous process to… Muscle Spinalis (Full) musculus spinalis (pars erectoris spinae) Lower Back The spinalis is the most medial and smallest column of the erector spinae, connecting spinous processes… Muscle Spinalis Capitis musculus spinalis capitis Head & Skull Spinalis capitis is the cranial extension of the spinalis column, often blending with semispinalis capitis. It… Muscle Spinalis Cervicis musculus spinalis cervicis Neck Spinalis cervicis is the cervical component of the spinalis column, running between upper thoracic and lower… Muscle Spinalis Group musculus spinalis Lower Back The spinalis is the most medially placed and smallest column of the erector spinae, running between… Muscle Spinalis Thoracis musculus spinalis thoracis Chest Spinalis thoracis is the medial column of the thoracic erector spinae, connecting lower thoracic and upper… Muscle Splenius Capitis musculus splenius capitis Neck The splenius capitis is a broad, strap-like muscle on the posterolateral neck running obliquely from the… Muscle Splenius Capitis (Full) musculus splenius capitis Head & Skull The splenius capitis is the superficial posterior cervical muscle running diagonally from the nuchal ligament to… Muscle Splenius Cervicis musculus splenius cervicis Neck The splenius cervicis lies deep to the splenius capitis, running from the mid-thoracic spinous processes to… Muscle Splenius Cervicis Detail musculus splenius cervicis detail Neck Splenius cervicis inserts on the upper cervical transverse process posterior tubercles, unlike splenius capitis which inserts… Muscle Stapedius musculus stapedius Head & Skull The stapedius is the smallest named muscle in the human body, measuring approximately 1 millimetre in… Muscle Stapedius Detail musculus stapedius detail Head & Skull The stapedius is the smallest named muscle in the human body (1 mm long). Its facial… Muscle Sternalis Muscle musculus sternalis Chest The sternalis is an anomalous superficial chest wall muscle running vertically on the anterior chest, parallel…

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