PPT-Persistant viral infections of the central nervous system

Persistant viral infections of the central nervous system Genomes either integrate or persist as episoms Mechanism of persistance is not yet understood Avoid detection and elimination by the host. A. Bacterial Infections of the Nervous System. 1. Bacterial Meningitis. A) Although bacteria can infect the brain, spinal cord, and peripheral nerves, they more commonly infect the meninges and cerebrospinal fluids resulting in meningitis. Functions of the Nervous System. Sensory input – gathering information. To monitor changes occurring inside and outside the body. Changes = stimuli. Integration. To process and interpret sensory input and decide if action is needed. Scalp and skin. Protection of the Central Nervous System. Figure 7.17a. Meninges. Dura mater. Double-layered external covering. Periosteum. —. Meningeal. . Layer-. Folds inward in several areas. Meninges. Peripheral Nervous System. Autonomic Nervous System. Allied Health I. Central Nervous System. Communication and coordination system of the body. Seat of intellect and reasoning. Consists of the brain, spinal cord, and nerves. The . function of the nervous system is:. To sense, interpret, and respond to internal and external environmental changes to maintain a steady state in the . body (homeostasis). The nervous system is divided into two major structures: . The Nervous System Central Nervous System Peripheral Nervous System Procedure A starting person will be chosen and will be given an object. Once the teacher gives the signal, the start person will pass the object to their right. Nervous System Nervous System Design 2 main section C entral N ervous S ystem P eripheral N ervous System   C entral N ervous S ystem  (CNS) brain and spinal cord.  encased in skull and vertebral column to protect 1. Two main divisions. a. . Central Nervous System . (CNS) – consists of brain and spinal cord. b. . Peripheral Nervous System . (PNS) – includes nerves extending from . brain and . spinal . cord . Brain. Spinal Cord. (also includes 4 chambers in brain called ventricles). Brain. 1) Cerebral Hemispheres. 2) Diencephalon. 3. ) Brain Stem. 4) Cerebellum. 1) Cerebral Hemispheres. Covered by ridges = . SYSTEM. By: . Shifaa. ’ Al . Qa’qa. ’. Infectious agents may reach the nervous system through several routes of entry:. Hematogenous. spread---- mc. Direct implantation. Local extension. Peripheral . (CNS) AND THE PERIPHERAL NERVOUS SYSTEM (PNS) Learning objectives: The nervous system in humans is a complex integration of organs like brain, spinal cord and sensory organs along with nerves. N AUTONOMIC NERVOUS SYSTEM. Two major subdivision. Parasympathetic . cranio. -sacral outflow. Sympathetic . . thoraco. -lumbar out flow. Responsible for the visceral control. Sometimes referred to as vegetative control. exanthem. . د. محمد يوسف حسن. Mumpus. virus( paramyxoviruses ).. parotid glands.. It is endemic worldwide and peaks at . 5–9 . yrs. . of age.. . Vaccination. has reduced childhood . exanthem. :. Exanthem. is the term classically used to describe a widespread rash associated with fever in childhood.. Maternal antibody gives protection for the first 6–12 months of life and infection occurs thereafter..