اناٹومی مطالعاتی نوٹ · Head and neck

Oculomotor nerve

The third cranial nerve (motor). It lifts the upper eyelid, turns the eye up, down and medially, constricts the pupil and accommodates the lens.

اہم نکات

CN III: all extraocular muscles except superior oblique (IV) and lateral rectus (VI).
Also levator palpebrae, sphincter pupillae, ciliary muscle (via the ciliary ganglion).
Palsy: down and out, ptosis, fixed dilated pupil.
III: somitomeres 1–2.
Motor nuclei: basal lamina. Sensory nuclei: alar lamina.
III parasympathetic: ciliary muscle + sphincter pupillae.
Nerve: epineurium → perineurium (blood–nerve barrier) → endoneurium.

Course · 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۔

Snell’s Clinical Anatomy by Regions, 10th ed., ch. 12, PDF pp. 1585, 1663–1665, 1684
Inderbir Singh’s Human Embryology, ch. 17, PDF pp. 312, 318, 345; ch. 9, PDF p. 126
BRS Cell Biology & Histology, 7th ed., ch. 9, PDF pp. 163–166, 166, 171–172; ch. 21, PDF p. 382