Chrome Extension

Home › Body Atlas › Muscles

Body Atlas, Muscle Reference

Muscles

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

676 muscles

676 muscles

Muscle Inferior Longitudinal Muscle of the Tongue musculus longitudinalis inferior linguae Head & Skull The inferior longitudinal muscle runs as a narrow band along the undersurface of the tongue between… Muscle Inferior Oblique (Eye) musculus obliquus inferior oculi Head & Skull The inferior oblique is one of the six extra-ocular muscles, the only one not arising from… Muscle Inferior Pharyngeal Constrictor musculus constrictor pharyngis inferior Head & Skull The inferior pharyngeal constrictor has two functionally distinct parts. The thyropharyngeus constricts the hypopharynx during swallowing.… Muscle Inferior Rectus (Eye) musculus rectus inferior oculi Head & Skull The inferior rectus depresses the abducted eye and is associated with the lower eyelid retractors, explaining… Muscle Inferior Tarsal Muscle musculus tarsalis inferior Head & Skull The inferior tarsal muscle is the lower eyelid homologue of Mueller's superior tarsal muscle, both receiving… Muscle Infraspinatus musculus infraspinatus Shoulder The infraspinatus occupies most of the infraspinous fossa below the scapular spine and is the primary… Muscle Infraspinatus Detail musculus infraspinatus detail Shoulder The infraspinatus is the primary external rotator and is the second most commonly torn rotator cuff… Muscle Innermost Intercostal Muscles musculi intercostales intimi Chest The innermost intercostal muscles are the deepest layer of the intercostal musculature, lying deep to the… Muscle Innermost Intercostals Detail musculi intercostales intimi detail Chest The innermost intercostals are the deepest intercostal layer, separated from the internal intercostals by the intercostal… Muscle Intercostal Muscles (External) musculi intercostales externi Chest The external intercostal muscles occupy the posterior and lateral intercostal spaces, with fibres running inferomedially analogous… Muscle Intercostales Externi musculi intercostales externi Chest The external intercostal muscles fill the intercostal spaces from the vertebral column to the costochondral junctions… Muscle Intercostales Interni musculi intercostales interni Chest The internal intercostal muscles run opposite to the external intercostals, with fibres directed downward and backward… Muscle Internal Anal Sphincter musculus sphincter ani internus Pelvis & Hip The internal anal sphincter is a 2-3 cm long thickening of the circular smooth muscle layer… Muscle Internal Anal Sphincter (Abdominal Component) musculus sphincter ani internus Abdomen The internal anal sphincter (IAS) is the involuntary smooth muscle ring surrounding the anal canal for… Muscle Internal Anal Sphincter Detail musculus sphincter ani internus detail Abdomen The internal anal sphincter is a smooth muscle thickening providing the majority of resting anal tone.… Muscle Internal Intercostals musculi intercostales interni Chest The internal intercostal muscles run perpendicular to the external intercostals (superoanteriorly rather than inferoanteriorly), depressing the… Muscle Internal Intercostals Detail musculi intercostales interni detail Chest The internal intercostals run at right angles to the external intercostals. Their oblique direction depresses the… Muscle Internal Oblique musculus obliquus internus abdominis Abdomen The internal oblique has fibres running roughly perpendicular to the external oblique, with most fibres directed… Muscle Internal Oblique Detail musculus obliquus internus abdominis detail Abdomen The middle flat abdominal muscle with fibres perpendicular to the external oblique. Its lowest fibres arch… Muscle Internal Urethral Sphincter musculus sphincter urethrae internus Pelvis & Hip The internal urethral sphincter is not an anatomically discrete muscle but rather a functional thickening of… Muscle Interossei Foot Group musculi interossei pedis (group) Foot & Ankle The foot interossei (four dorsal and three plantar) are the intrinsic muscles that stabilise the toe… Muscle Interosseous Dorsalis I (First) musculus interosseus dorsalis primus manus Hand & Wrist The first dorsal interosseous is the most prominent and easily tested interosseous muscle, forming the rounded… Muscle Interosseus (Foot) Dorsal musculi interossei dorsales pedis Foot & Ankle The four dorsal interossei of the foot abduct the second, third, and fourth toes away from… Muscle Interspinales (Lumbar) musculi interspinales lumborum Lower Back The lumbar interspinales are paired small muscles flanking the interspinous ligament between adjacent spinous processes. They…

←1…10 111213 14…29 →