Third Layer of Plantar Muscles Diagram
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Third Layer of Plantar Muscles Diagram

Third layer of plantar muscles includes flexor hallucis brevis (to big toe), adductor hallucis (oblique/transverse heads to big toe), and flexor digiti minimi brevis (to little toe). They support toe…
Interspinales Muscle of the Back Diagram
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Interspinales Muscle of the Back Diagram

Interspinales muscles span between adjacent spinous processes (cervical/thoracic/lumbar), aid extension, stabilize vertebrae during posture/movement. Part of deep back muscles.
Action Potential Heart Contraction
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Action Potential Heart Contraction

A heart physiology illustration linking action potentials to contraction demonstrates how electrical signals drive each heartbeat. It traces the spread of an action potential through cardiac muscle cells, beginning with…
Heart Musculature
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Heart Musculature

The heart's muscular wall, the myocardium, consists of specialized cardiac muscle cells arranged in spiral and circular bundles unique to each chamber. Atrial muscle is thinner and arranged in loops,…