SPINAL NERVE | CNS | 31 PAIR OF SPINAL NERVE | LOCATIONS AND FUNCTION | HUMAN ANATOMY & PHYSIOLOGY
Channel: PHARMAROCKS THE WAY OF SUCCESS
Date: 2020-11-03

SPINAL NERVE

NERVOUS SYSTEM
The nervous system is a complex collection of nerves and specialized cells known as neurons that transmit signals between different parts of the body.
The nervous system is involved in receiving information about the environment around us (sensation) and generating responses to that information (motor responses). 

CLASSIFICATION OF NERVOUS SYSTEM
The nervous system is classified into the central and peripheral nervous system. 
The central nervous system (CNS) consists of the brain and spinal cord, leaving everything else in the peripheral nervous system (PNS).

SPINAL CORD
The spinal cord is a long, fragile tubelike structure that begins at the end of the brain stem and continues down almost to the bottom of the spine. 
The spinal cord consists of nerves that carry incoming and outgoing messages between the brain and the rest of the body.

SPINAL CORD STARTING AND END
In length, the spinal cord starts from the foramen magnum of the occipital bone to disc between the ﬁrst & second lumbar vertebrae.

SPINAL NERVE
A spinal nerve is a mixed nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body. 
In the human body there are 31 pairs of spinal nerves, one on each side of vertebral column.

SPINAL NERVE 31 PAIRS
Each spinal nerve is a mixed nerve, formed from the combination of nerve fibers from its dorsal and ventral roots. 
The dorsal root is the afferent sensory root and carries sensory information to the brain. 
The ventral root is the efferent motor root and carries motor information from brain.
Outside the vertebral column, the nerve divides into branches.

A spinal nerve is a mixed nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body. 
In the human body there are 31 pairs of spinal nerves, one on each side of vertebral column.

8 cervical, 
12 thoracic, 
5 lumbar, 
5 sacral
1 coccygeal. 
Each pair connects the spinal cord with a specific region of body. 
Near the spinal cord each spinal nerve branches into two roots.


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