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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 Interspinales (Lumbar) musculi interspinales lumborum Lower Back The lumbar interspinales are paired small muscles flanking the interspinous ligament between adjacent spinous processes. They… Muscle Intertransversarii musculi intertransversarii Spine The intertransversarii connect adjacent transverse processes throughout the cervical and lumbar spine, acting as intersegmental lateral… Muscle Intertransversarii (Lumbar) musculi intertransversarii lumborum Lower Back The lumbar intertransversarii connect adjacent lumbar transverse processes and, like the rotatores, are thought to serve… Muscle Ischiocavernosus musculus ischiocavernosus Pelvis & Hip The ischiocavernosus muscle covers the crus of the erectile tissue and compresses it during erection, preventing… Muscle Ischiocavernosus (Full) musculus ischiocavernosus Pelvis & Hip The ischiocavernosus covers the crus of the penis or clitoris, compressing it to maintain erection by… Muscle Lateral Cricoarytenoid musculus cricoarytenoideus lateralis Neck The lateral cricoarytenoid is the primary vocal cord adductor, rotating the arytenoid cartilage to bring the… Muscle Lateral Pterygoid musculus pterygoideus lateralis Head & Skull The lateral pterygoid is the only masticatory muscle that actively opens the jaw, working with the… Muscle Lateral Pterygoid musculus pterygoideus lateralis Head & Skull The lateral pterygoid is the only jaw muscle with two heads with opposing functions. The inferior… Muscle Lateral Rectus (Eye) musculus rectus lateralis oculi Head & Skull The lateral rectus is the only extra-ocular muscle supplied by the abducens nerve (CN VI), making… Muscle Latissimus Dorsi musculus latissimus dorsi Upper Back The latissimus dorsi is the broadest muscle in the human body, spanning from the lower back… Muscle Levator Anguli Oris musculus levator anguli oris Head & Skull The levator anguli oris lifts the corner of the mouth upward and slightly medially, deepening the… Muscle Levator Ani musculus levator ani Pelvis & Hip The levator ani is the primary muscular floor of the pelvis, a broad muscular diaphragm forming… Muscle Levator Labii Superioris musculus levator labii superioris Head & Skull The levator labii superioris elevates the upper lip and deepens the nasolabial fold, contributing to expressions… Muscle Levator Labii Superioris musculus levator labii superioris Head & Skull The levator labii superioris elevates the upper lip and dilates the nostril. Its nasolabial deepening action… Muscle Levator Labii Superioris Alaeque Nasi musculus levator labii superioris alaeque nasi Head & Skull The levator labii superioris alaeque nasi is one of the longest named muscles in the body,… Muscle Levator Palpebrae Superioris musculus levator palpebrae superioris Head & Skull The levator palpebrae superioris is the primary elevator of the upper eyelid, arising from the sphenoid… Muscle Levator Scapulae musculus levator scapulae Neck The levator scapulae is a strap muscle on the posterolateral neck connecting the upper cervical transverse… Muscle Levator Scapulae (Full) musculus levator scapulae Neck The levator scapulae is the primary scapular elevator, running from the upper cervical transverse processes to… Muscle Levator Veli Palatini musculus levator veli palatini Head & Skull The levator veli palatini is the primary elevator of the soft palate, contracting to close the… Muscle Longissimus musculus longissimus Spine The longissimus is the largest and most central column of the erector spinae, spanning the full… Muscle Longissimus (Full) musculus longissimus (pars erectoris spinae) Lower Back The longissimus is the intermediate and longest column of the erector spinae, running from the common… Muscle Longissimus Cervicis musculus longissimus cervicis Neck The cervical longissimus is the intermediate column of the erector spinae in the neck, connecting the… Muscle Longissimus Thoracis musculus longissimus thoracis Spine The longissimus thoracis is the largest component of the erector spinae and the primary extensor of… Muscle Longus Capitis musculus longus capitis Neck The longus capitis connects the upper cervical transverse processes to the occipital bone, producing the nodding…
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