Autonomic Nervous System Practical PDF

AUTONOMIC NERVOUS SYSTEM General Physiology Practical CBL (4) BMS 115 Case 1 Case 2 Objectives of case 2 CLASSIFICATION OF NERVOUS SYSTEM Anatomical Physiologic al AUTONOMIC NERVOUS SYSTEM  Sympathetic...

AUTONOMIC NERVOUS SYSTEM General Physiology Practical CBL (4) BMS 115 Case 1 Case 2 Objectives of case 2 CLASSIFICATION OF NERVOUS SYSTEM Anatomical Physiologic al AUTONOMIC NERVOUS SYSTEM  Sympathetic Parasympathetic (Thoraco- Lumbar) Cranio-sacral. Origin All Thoracic and upper lumbar nerves (1, 2 & 3). Cranial nerves (III, VII, IX, X) and sacral nerves (2, 3 & 4). Catabolic system. Anabolic system. It prepares the body to cope with an emergency, i.e. flight, fear, or fight. This is It operates during rest, digestion, reading, diuresis, and defecation Type called: Alarm or "Stress" response. Eye: Eye: - Dilatation of eye pupil → Mydriasis. - Contraction of eye pupil→ Miosis. - Elevation of upper eye lid - Contraction of ciliary muscle increase lens power (near vision). - Relaxation of ciliary muscle helps far vision. - Decreases tear secretion. Salivary glands: Salivary glands: - Increase the saliva secretion (become watery). - Decrease the saliva secretion becomes (trophic, concentrated, and viscid). - Vasodilatation of the salivary glands. - Vasoconstriction of the salivary glands. Actions on Head & Skin: Neck - Increase sweating (Secretory to sweat glands) - Vasoconstriction of skin blood vessels. - Erection of hairs Cerebral circulation: - Increase cerebral blood flow due to increase arterial blood pressure  Sympathetic Parasympathetic Heart: Heart: - Increase all cardiac properties: ↑ Heart rate, rate of conduction, - Vagus nerve does not supply ventricles of heart. force of contraction and excitability - It decreases heart rate and force of contraction of atrial muscle. - Vasodilatation of the Coronaries (indirect) - Vasoconstriction of coronary arteries. Actions on Thoracic Lungs: Lungs: - Bronchodilation. - Bronchoconstriction. -Vasoconstriction of pulmonary vessels. - Vasodilatation and increase the bronchial secretion. -Relaxation of wall of (stomach, small intestine & proximal colon) -Motor to wall of (stomach, small intestine & proximal colon). -Motor to sphincters - Relaxation of the sphincters - Liver: Glycogenolysis to increase blood glucose -Secretory and vasodilation to GIT glands, liver and pancreas. - Spleen: Contraction of spleen capsule to ↑RBCs in circulation. -evacuation of gall bladder. - Adrenal medulla: increase secretion of adrenaline & nor Actions on abdominal viscera adrenaline. - Relaxation of the wall of (distal colon, rectum & urinary bladder). - Motor of the wall of (distal colon, rectum & urinary bladder). - Motor to the internal anal sphincter (feces retention) & internal - Relaxation of the internal anal sphincter (Defecation) & Actions on pelvic viscera urethral sphincter (urine retention). internal urethral sphincter (Micturition).