physiology

Si plified

BY….Dr.M7md El-Bshany

• Origin of sympathetic.• Origin of parasympathetic.• Autonomic ganglia.

Objectives

Edinger-westphal nucleus

Superior salivary nucleus

Inferior salivary nucleus

Dorsal vagal nucleus

Autonomic Ganglia

Def. Collection of cell bodies of neurons outside CNS

function Relay station.Distributing centers …

sypmathetic Para-sympathetic

1:32 1:1

Pre-ganglionic

ganglion

Post-ganglionic

Lateral(paravertebral) Ganglia 22-24 ganglia each side. Extend fro base of skull to coccyx. Relay for sympathetic pre-ganglionic fibers. 3 cervical(superior , middle , inferior). -12 thoracic. - 5 lumbar. - 5 sacral. - 1 coccygeal.

lateral(para-vertebral) Ganglia

collateral(pre-vertebral) Ganglia Present mainly in abdomen mid-way () spinal cord & viscera Relay of sympathetic preganglionic fibers). Related to branches of Aorta . - celiac. - superior mesenteric. - inferior mesenteric.

Terminal Ganglia Small ganglia lie close to or in wall of effector organ. Has short post-ganglionic fibers. Relay for sympathetic & parasympathetic preganglionic

fibers.

Parasympathetic terminal Ganglia

Ciliary ganglia→ occulo-motor. Shpeno-palatine ganglia → facial n. Submandibular ganglia → facial n. Otic ganglia → glosso-pharyngeal n. Terminal ganglia of vagus

Per-ganglionic post-ganglionicOrigin Inside CNS Outside CNS

End At ganglia At effector organ

Type Thin myelinated (type B) Non-myelinated (type C)

Colour White Grey

NO. Few more

Chemical transitter

Acetyl-choline Symp …… adrenaline OR acetyl-choline.Para-symp …….. Acetyl-choline

Per-ganglionic neurons VS post-ganglionic neurons