Nervous System And Special Senses
Nervous System And Special Senses
Disorders of the Nervous System and Special Senses Memo
-Imagine you are an official in a hospital or public health agency.
-Write a memo, at least 350 words in length, to a fictional colleague in which you use 5 words from the below.
Nervous
Encephalon
sulcus
Cerebellum
precentral
postcentral.
contralateral.
Neurosis
Psychosis
Schizophrenia
Antipsychotic
Bifida
Congenital
Neuropathology
Iris
Optic
blepharitis
Ophthalmoscope
Myopia
Auditory
-Be sure to use the words in such a way that it is clear to the reader that you know the exact meaning of each of the 5 words.
Note: without Plagiarism pleas
Nervous System
The physiology of the nervous system can be explored at the level of a nerve cell, or ‘neuron’. Communication between these cells uses electrical or chemical signals known as neurotransmitters; the cellular response generated in response to this signalling is known as an action potential.
Central Nervous System (CNS)
The central nervous system is comprised of the brain and spinal cord. The brain is contained within the skull, and the spinal cord is contained within the spinal vertebral canal. The brain is covered and protected by the meninges. The meninges are comprised of three layers: the dura mater (the outermost layer), the arachnoid mater (the middle layer), and the pia mater (the innermost layer). Cerebral Spinal Fluid (CSF) is the fluid surrounding the brain as well as the central canal of the spinal cord which helps cushion the CNS, acts as a chemical buffer, provides immunological protection and transports waste products and nutrients. Nerves arising from the brain and brain stem are the cranial nerves whilst those arising from the spinal cord are the peripheral nerves.
Development
Forebrain
Midbrain
Hindbrain
Spinal Cord
Meninges
Vasculature
Histology
Peripheral Nervous System (PNS)
The Peripheral Nervous System includes both cranial nerves and spinal nerves, and is commonly divided into the somatic nervous system and the autonomic nervous system. The somatic nervous system co-ordinates body movements and also receives external stimuli. It basically regulates activities that are under conscious control. The autonomic nervous system contains the sympathetic nervous system and the parasympathetic nervous system as well as an enteric division. The sympathetic nervous system is the ‘fight or flight’ system which is triggered when an animal is under threat; it’s main neurotransmitter is adrenaline. The parasympathetic nervous system is the ‘rest and digest’ system which is responsible for digestion; the primary neurotransmitter is acetylcholine. Further information on the structure, physiology and pathology of the PNS is available from the following links:
Structure
Reflex Arc
Vasculature
Histology
Information Pathways
In physiological terms, when processing information the CNS and PNS are integrated into pathways; examples would include motor pathways and sensory pathways. Motor pathways carry signals from the cerebellum to the skeletal muscles using upper and lower motor neurons connected via the pyramidal system or the extrapyramidal system. Sensory pathways carry sensory information detected by peripheral nerves in an ascending path through the spinal cord to the higher levels of the brain. Types of general somatic sensation include pain, touch, temperature and kinaesthesia (conscious proprioception).
Special Senses
In anatomy, there are four major senses which have specialised organs assocated with them. They are the eye, the ear, the nose and the tongue. These organs process visual, auditory, olfactory and taste sensations respectively.
Nervous System And Special Senses
Nervous and Special Senses – Anatomy & Physiology Learning Resources
Vetstream
To reach the Vetstream content, please select
Canis, Felis, Lapis or Equis
Flashcards
Test your knowledge using flashcard type questions
Sensory Pathways Flashcards – Anatomy & Physiology
Videos
Selection of relevant videos
Transverse Section of Cerebral Hemispheres potcast
Canine orbit and sagittal section of the canine head potcast
Lateral surface of the head of the dog potcast 4
Ventral surface of the brain potcast
References
BOOKS
Textbook of Veterinary Anatomy by Dyce, Sack and Wensing. 3rd Edition
Veterinary Anatomy of Domestic Mammals by König and Liebich. 3rd Edition
IMAGES
Royal Veterinary College Histology Department
Posted: a year ago
Due: 27/11/2018
Budget: $5
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