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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 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 Risorius musculus risorius Head & Skull The risorius is a variable and inconsistent muscle present in approximately 50 percent of people, pulling… Muscle Risorius Detail musculus risorius detail Head & Skull The risorius is a variable muscle — it may be absent, single, or multiple on each… 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 Cervicis musculi rotatores cervicis Neck The cervical rotatores are the deepest cervical paraspinals connecting adjacent vertebral segments. They function primarily as… Muscle Rotatores Lumborum musculi rotatores lumborum Lower Back The lumbar rotatores are the deepest lumbar paraspinals with the highest muscle spindle density, functioning primarily… 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 Salpingopharyngeus musculus salpingopharyngeus Head & Skull The salpingopharyngeus is a small muscle arising from the pharyngeal end of the Eustachian tube (salpinx… Muscle Salpingopharyngeus Muscle musculus salpingopharyngeus Neck The salpingopharyngeus is a thin muscle arising from the inferior Eustachian tube cartilage at the tubal… Muscle Sartorius musculus sartorius Thigh The sartorius is the longest muscle in the human body, running diagonally across the entire anterior… Muscle Sartorius (Full) musculus sartorius Thigh The sartorius is the longest muscle in the body, crossing both the hip and knee as… Muscle Scalenes musculi scaleni Neck The scalenes are a group of three muscles on the lateral neck connecting the cervical transverse… Muscle Scalenus Anterior musculus scalenus anterior Neck The scalenus anterior is the most important of the three scalene muscles clinically, dividing the posterior… Muscle Scalenus Medius musculus scalenus medius Neck The scalenus medius is the largest and most posterior scalene, forming the posterior wall of the… Muscle Scalenus Minimus musculus scalenus minimus Neck The scalenus minimus is a small and inconstant muscle present in approximately 36 percent of people,… Muscle Scalenus Minimus Detail musculus scalenus minimus detail Neck Scalenus minimus is an accessory scalene muscle present in approximately 50% of individuals. It contributes to… Muscle Scalenus Posterior musculus scalenus posterior Neck The scalenus posterior is the smallest and deepest of the three scalene muscles, running from the… Muscle Second Dorsal Interosseous Detail (Hand) musculus interosseus dorsalis secundus manus detail Hand & Wrist The second dorsal interosseous abducts the middle finger toward the index finger. The four dorsal interossei… Muscle Second Dorsal Interosseous of the Foot musculus interosseus dorsalis secundus pedis Foot & Ankle The second dorsal interosseous abducts the second toe laterally, toward the third toe. Because the second…

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