Anatomy And Physiology Of Peripheral Nervous System Pdf
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Skip to content. Skip to navigation. Firstly, with the nervous system there are many new terms you will likely come across, whether its in this section, in other anatomy text books and in the fitness industry.
The Peripheral Nervous System
The peripheral nervous system PNS is one of two components that make up the nervous system of bilateral animals , with the other part being the central nervous system CNS. The PNS consists of the nerves and ganglia outside the brain and spinal cord. The peripheral nervous system is divided into the somatic nervous system and the autonomic nervous system. In the somatic nervous system, the cranial nerves are part of the PNS with the exception of the optic nerve cranial nerve II , along with the retina. The second cranial nerve is not a true peripheral nerve but a tract of the diencephalon. However, the remaining ten cranial nerve axons extend beyond the brain and are therefore considered part of the PNS. The peripheral nervous system is divided into the somatic nervous system , and the autonomic nervous system.
Nervous System: Anatomy and Function
What exactly is the peripheral nervous system and what role does it play in the body? First, it is important to realize that the nervous system is divided into two parts: the central nervous system and the peripheral nervous system. The central nervous system includes the brain and spinal cord, while the peripheral nervous system includes all of the nerves that branch out from the brain and spinal cord and extend to other parts of the body including muscles and organs. Each part of the system plays a vital role in how information is communicated throughout the body. The peripheral nervous system PNS is the division of the nervous system containing all the nerves that lie outside of the central nervous system CNS. These nerves extend from the central nervous system to the outermost areas of the body. The peripheral system allows the brain and spinal cord to receive and send information to other areas of the body, which allows us to react to stimuli in our environment.
PNS Physiology and Anatomy. • Dorsal root ganglion are the sensory bodies of the PNS. • The Ventral root is responsible for motor movement.
The Peripheral Nervous System
The brain and the spinal cord are the central nervous system, and they represent the main organs of the nervous system. The spinal cord is a single structure, whereas the adult brain is described in terms of four major regions: the cerebrum, the diencephalon, the brain stem, and the cerebellum. The regulation of homeostasis is governed by a specialized region in the brain. The coordination of reflexes depends on the integration of sensory and motor pathways in the spinal cord.
The nervous system is a complex network of nerves and nerve cells neurons that carry signals or messages to and from the brain and spinal cord to different parts of the body. It is made up of the central nervous system and the peripheral nervous system. The central nervous system CNS is made up of the brain and spinal cord.
In biology , the nervous system is a highly complex part of an animal that coordinates its actions and sensory information by transmitting signals to and from different parts of its body. The nervous system detects environmental changes that impact the body, then works in tandem with the endocrine system to respond to such events. The CNS consists of the brain and spinal cord.
The picture you have in your mind of the nervous system probably includes the brain , the nervous tissue contained within the cranium, and the spinal cord , the extension of nervous tissue within the vertebral column. The brain is contained within the cranial cavity of the skull, and the spinal cord is contained within the vertebral canal of the vertebral column. The peripheral nervous system is so named because it is in the periphery—meaning beyond the brain and spinal cord. In addition to the anatomical divisions listed above, the nervous system can also be divided on the basis of its functions.
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