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Body Atlas, Muscle Reference

Muscles

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

118 muscles

118 muscles in Head & Skull Clear ×

Muscle Depressor Septi Nasi musculus depressor septi nasi Head & Skull The depressor septi nasi pulls the nasal base and septum downward during animation, producing the tip… Muscle Depressor Supercilii musculus depressor supercilii Head & Skull The depressor supercilii is a small facial muscle considered by some anatomists to be a separate… Muscle Digastric (Full) musculus digastricus Head & Skull The digastric is a two-bellied suprahyoid muscle with different embryological origins and nerve supplies for each… Muscle Digastric Anterior Belly venter anterior m. digastrici Head & Skull The anterior belly of the digastric is innervated by the trigeminal nerve (unlike the posterior belly… Muscle Digastric Posterior Belly venter posterior m. digastrici Head & Skull The posterior belly of the digastric is innervated by the facial nerve, reflecting its second branchial… Muscle Dilator Naris pars alaris m. nasalis (dilator naris) Head & Skull Dilator naris is the alar part of nasalis, flaring the nostril during inspiration to reduce nasal… Muscle Dilator Pupillae musculus dilator pupillae Head & Skull The dilator pupillae is a thin sheet of radially oriented smooth muscle fibres in the posterior… Muscle Frontalis musculus frontalis Head & Skull The frontalis is the forehead muscle, the only elevator of the eyebrow, running from the galea… Muscle Frontalis Detail musculus frontalis detail Head & Skull The frontalis is the only muscle that elevates the brow. Unlike most facial muscles, it inserts… Muscle Genioglossus musculus genioglossus Head & Skull The genioglossus is the largest extrinsic tongue muscle and the primary protruder of the tongue. Its… Muscle Geniohyoid musculus geniohyoideus Head & Skull The geniohyoid is a narrow muscle running from the inner mandibular chin to the hyoid, acting… Muscle Hyoglossus musculus hyoglossus Head & Skull The hyoglossus is a flat, quadrilateral muscle connecting the hyoid bone to the lateral tongue, depressing… Muscle Incisivii Labii Inferioris musculus incisivii labii inferioris Head & Skull The incisivii labii inferioris (lower) is the mandibular counterpart to the superior version, connecting the lower… Muscle Incisivii Labii Muscles musculi incisivii labii superioris et inferioris Head & Skull The incisivii labii are small paired accessory muscles of facial expression arising from the alveolar processes… Muscle Incisivii Labii Superioris musculus incisivii labii superioris Head & Skull The incisivii labii superioris (upper) is one of the smaller perioral muscles contributing to lip shaping… 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 Lateral Cricoarytenoid Detail musculus cricoarytenoideus lateralis detail Head & Skull The lateral cricoarytenoid is the primary adductor of the vocal fold, bringing the arytenoid cartilages together… 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 Inferior Head caput inferius m. pterygoidei lateralis Head & Skull The inferior head of the lateral pterygoid is unique in being active during mouth opening rather… Muscle Lateral Pterygoid Superior Head caput superius musculi pterygoidei lateralis Head & Skull The lateral pterygoid muscle has two distinct heads with different functions: the inferior head protrudes and…