Lecture 7 (Autonomic Nervous System) .pdf

‫نظام األعصاب الالإرادية‬ Autonomic Nerves System DR SAFA ABDUL GHANI Go - ‫أقسام الجهاز العصبي‬ & 15594' - & zigl Nig &53 + &is % /Mds...

‫نظام األعصاب الالإرادية‬ Autonomic Nerves System DR SAFA ABDUL GHANI Go - ‫أقسام الجهاز العصبي‬ & 15594' - & zigl Nig &53 + &is % /Mds -- ↑ Somatici s use #I s & - ↑ 099984 - Central 1111 peripherals : I ·. - * : & Efferent motor I · (2) (a) Skeletal /) 1 - muscle externa sphentic So Autonomic 11 is - s's motor sensory Joey I ins TS6 8 Somatic N.. S - skeletal muscles o 299 3. - g External spatar I &150 61. 9  ‫أقسام الجهاز العصبي‬ Divisions of the nervous system The human nervous system consists of the central nervous System (CNS) and the Peripheral Nervous System (PNS). ‫(ز‬PNS ‫( والجها‬CNS) ‫يتكون الجهاز العصبي البشري من الجهاز العصبي املركزي‬ ) ‫العصبي املحيطي‬ CNS is composed of the brain (located in the ‫…טוען‬ cranial cavity) and the spinal cord (located in the vertebral cavity), which serve as the main control centers for all body activities. PNS is composed of nerves derived from the brain and spinal cord (12 pairs of cranial nerves and 31 pairs of spinal nerves) which serve as linkage between the CNS and the body ‫يتكون الجهاز العصبي املحيطي من أعصاب مشتقة من‬ ‫ زوًجا من األعصاب القحفية‬12) ‫الدماغ والحبل الشوكي‬ 1) esi129541 % W ‫وزوًجا من األعصاب الشوكية( والتي تعمل بمثابة حلقة‬ Esj315164g Cranial nerve · ‫وصل بني الجهاز العصبي املركزي والجسم‬  ANS Versus SNS &Is M PNS can be subdivided &4. N into sensory (afferent) 10, & - nerves and motor (efferent) nerves. Sensory & nerves send nerve impulse from the body to CNS to effector organs The efferent division of the peripheral nervous system can be subdivided into: 1. Somatic motor neurons, which control skeletal muscles ‫ التي تتحكم في العضالت الهيكلية‬.‫الخاليا العصبية الحركية الجسدية‬ 2. Autonomic neurons, which control smooth muscle, cardiac muscle, many glands, and some adipose tissue ‫ة‬،‫كموبفعيضالاعألنضسالجتة ااملللدهسنايء‬،‫ املتن ايل تغتددح‬،‫الوإالراعددييةد‬،‫الخاليواع الضعلةصالبيقلة ابل‬  G* sympathetic s - o 259.. organs &s Autonomic nerves system & is d issues : · - & & in gis o ANS can be divided into : Ji ilo's i s - - ↑ is sympathetic sympathetic · Os So parasymthetics stimulate activities of the effect or organs ‫الجهاز الهضمي…טוען‬ (except digestive organs) ‫تحفيز أنشطة التأثير أو األعضاء )باستثناء أعضاء‬ parasympathetic inhibit activities of the effect or organs (except digestive organs)..‫تمنع أنشطة التأثير أو األعضاءال)بجاهاسزتثانلاهء أضعمضيا(ء‬ ‫التوازن هو التوازن الديناميكي بني الفروع الالإرادية‪.‬‬ ‫‪Figure 11-1‬‬  · - Gi & S - - Sympathetic * & ji - &do↓ - is in jsldt' & &5. 25% s · Jigs- Fight-or-flight ↑ & & a i sar N &s parasympathetic # -- Is 29s sea , didn & G. 1) - ↑ - · "Did Nois Rest and digest - - parasympatheticg sympathetics did Involuntary I nod - - s  Autonomic Nerve Syntem ANS Characteristics : ‫يعصب العضالت امللساء وعضلة القلب وغدد األعضاء الداخلية‬ 1. Innervates smooth muscle , cardiac muscle and glands of internal organs. ‫ ويتم التحكم في ردود الفعل‬،‫ال إرادي‬ 2. Involuntary , are reflexes controlled. ‫سلسلتني من الخاليا العصبية‬ 3. two neuron chain : &8 s & a. preganglionic neurons – originate in the · - brain or spinal cord. - I & 19 · is imag - j postoganglines && & - & preganglionic ↑ b. postganglionic neurons – originate in the ganglion located outside the CNS.  · basslin & eganglionist ganglion is : ereganglionic 1&-J ① ② - A * Is- i diy & & & 101-ganglion Spinal cord 11 51 sids : & & &estgglion - ↑ -- &10-ganglion 11-5 jicsl & &s  64 C C n Synapse & :J 98 200 Weis' - -- 5 o Wiz ul i s No S & S & - C C E ↓ Figure 11-13b Cranial Nerves with Parasympathetic outflow & % 1848 Ys %- Cranial - Vagus nerve (X) - I Vagusnerve 1 two vagus nerves account for 90% nerve s of all preganglionic &i&s195 vagus T. & is 4 & parasympathetic fibers in the body. ↑ preganglioni major portion of parasympathetic cranial outflow is via vagus nerve. mixed nerve containing both sensory and motor fibers. sensory input from medulla to cardiovascular, pulmonary, urinary, reproductive, and digestive system travels in the afferent fibers of the vagus nerve. smooth muscle , s - 8.. % 1 - - /95 - i= 08 --- one unit is Ne is s Na -584- &  Sympathetic : His ↑ Tyrosine i ↓ - 419 ·%. 4, 61 git.. 9 Postsynaptic & G Actochylinisteres &I & &166S 9. lis && &s Action potential 199 on ↑ isey coty - voltage-gated 11.- : & t ↑-%. G's Targetcelly & 209. % excosytosis did ↑ 1982 - Active Transporta Recycle &. S Blood vessels & 209. &1 % %SS &.. Figure 11-9  Sympathetic 10 jgis. ↑ Preganglionic Adrenalgland- gland - ess medulla sl %% > Cortey 119 Figure 11-10a  * & Medella Adrenal gland tissue S ti gland ↑ 11 sim s symthtics, -na pregationic 1 wo · guj5 I 9115C S using 118 I - medell neuromone - - penzt - Figure 11-10 - Overview  X ‫…טוען‬ ↓ S X 0. jas gas - Table 11-3 Figure 11-11 - Overview (1 of 5)  Effects of autonomic Stimulation. Digestive system: Sympathetic parasympathetic o Gall bladder: (s): relaxation (p): constriction - Sell Intestine: (s): decrease peristalsis (p): Increase peristalsis Smooth muscle: (s): relaxes (p): Contracts Sphincters: (s): constricts (p): Relaxes 2. Respiratory System: (s): dilate bronchioles (p): constrict 3. Heart Muscle: (s): increase heart rate (p): decrease 4. Blood vessels: (S): constriction (P): no action 5. Urinary system: Bladder (S): Relaxation (P): contraction Urinary sphincter (S): contraction (P): relaxation 6. penis: (S): causes erection (P): causes ejaculation 7. Vagina: (S):causes erection of clitoris (P):causes contraction  · &. - * Parymothtic 19 sympathetic I Brain 11 18 9.. End # ! - steam E& Brain i -S 2011 1139 - Mo - Medelaopel data W & P S Figure 11-3