اناٹومی مطالعاتی نوٹ · Pelvis

Sacral plexus

The nerve plexus on the front of piriformis, formed by the lumbosacral trunk (L4, L5) and the anterior rami of S1–S4. It supplies the buttock, most of the lower limb, the perineum and the pelvic viscera.

اہم نکات

• L4–S4 on piriformis.
• Sciatic (L4–S3) = largest nerve.
• Superior gluteal → gluteus medius/minimus + TFL; inferior gluteal → gluteus maximus.
• Pudendal S2–S4; pelvic splanchnics S2–S4 (parasympathetic).
• Upper limb nerves: C4–T2 segments; lower limb: L2–S2.
• Ventral root: basal-lamina neurons. Dorsal root: neural-crest ganglion cells.
• Nerve: epineurium → perineurium (blood–nerve barrier) → endoneurium.
• Cut nerve: Wallerian degeneration; regrows 0.5–3 mm/day.

اٹلس میں مکمل نوٹ میں یہ بھی شامل ہے

Relations · Branches · Histology · Development · طبی اہمیت

مفت سائن اِن کریں تاکہ اسے 3D ماڈل پر دیکھیں، مکمل نوٹ پڑھیں اور اس پر سوالات کی مشق کریں۔

ماخذ

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 8, PDF pp. 1044–1050
• Inderbir Singh’s Human Embryology, ch. 17, PDF pp. 318, 321, 323–325, 345–346; ch. 10, PDF pp. 143–144
• BRS Cell Biology & Histology, 7th ed., ch. 9, PDF pp. 163–166, 171–172

pelvis سے مزید

• Sacrococcygeal joint
• Sacroiliac joint
• Sacrotuberous and sacrospinous ligaments
• Sacrum
• Seminal vesicle
• Sigmoid colon
• Urinary bladder
• Uterine artery
• Uterine tube
• Uterus
• Vagina
• Coccygeus

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