MEDICAL BIOLOGY, HUMAN ANATOMY, PHYSIOLOGY AND PATHOLOGY - Ya.I. Fedonyuk 2010

ANATOMY, PHYSIOLOGY, PATHOLOGY

SECTION 3. ANATOMICAL AND PHYSIOLOGICAL ASPECTS OF THE SELF-REGULATION OF BODY FUNCTIONS

FUNCTIONAL ANATOMY OF THE PERIPHERAL NERVOUS SYSTEM

SPINAL NERVES

2. ANTERIOR BRANCHES

2.4. Sacral Plexus

The sacral plexus (plexus sacralis) is formed by the anterior rami of all sacral and coccygeal Spinal Nerves, as well as partially by the anterior rami of the 4th and 5th lumbar spinal nerves. It gives rise to short and long branches. The short branches innervate the Muscles of the pelvis and the gluteal region. The long branches include the posterior femoral cutaneous nerve and the sciatic nerve (Fig. 3.43). The sciatic nerve is the largest nerve in The Human Body, with branches supplying the Posterior Thigh Muscles, the muscles and Skin of the posterior, lateral, and anterior aspects of the leg, the muscles and skin of the FOOT (except for the medial margin), as well as the skin and muscles of the Perineum.

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Fig. 3.43. Sacral plexus



Last update: 08/08/2026

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