Nervous System: The Spinal Cord and Spinal Nerves
questions with verified answers
About the peripheral distribution of spinal nerves, in reference to the
Dorsal and Ventral Rami, what area of the body do they provide
innervation to? Ans✓✓✓The dorsal or posterior ramus of each spinal
nerve provides somatic and visceral motor fibers that innervate the skin
and skeletal muscles of the back.
Sensory and motor innervations of the skin and skeletal muscles of the
sides and front of the body are provided by the Ventral or Anterior
Ramus
Brachial plexus Ans✓✓✓The Ventral Rami of Spinal nerves C5-T1
Five major terminal branches found in this Plexus
1. Axillary nerve
2. Median nerve
3.Musculocutaneous nerve
4. Radial nerve
5. Ulnar nerve (from medial cord)
Cervical plexus: Ans✓✓✓Consist of C1-C5
The branches of the cervical region (plexus) innervate the muscles of the
neck and shoulder.
Coccygeal Plexus: Ans✓✓✓S4 to Co
, Define Dura Mater Ans✓✓✓The tough, fibrous Dura mater (dura, hard
mater, mother) is the layer that forms the outermost covering of the
spinal cord.
Define Epidural Space Ans✓✓✓A region that contains loose
connective tissue, some blood vessels, and a protective padding of
adipose tissue.
Located between the Dura mater and the walls of the vertebrae lies the
epidural space.
Define Nerve Plexus? Ans✓✓✓Converge or joining, the ventral rami of
adjacent spinal nerves are called Plexus.
The Plexus blend their fibers, producing a series of compound nerve
trunks, such a complex interwoven network
Define Spinal Meninges? Ans✓✓✓Is a series of specialized membranes
surrounding and protecting the spinal cord. They providing the
necessary physical stability and shock absorption.
Define the Innate. Provide an example of the stretch reflex?
Ans✓✓✓Innate reflexes
Reflexes resulting from the connections that forms between neurons
during development. Ex. Removal of hand from fire
Define: The Crossed Extensor Reflex? Ans✓✓✓The crossed extensor
reflex (polysinaptic) is called a contralateral reflex arc (contra, opposite),
because the motor response occurs on the side opposite the stimulus.
questions with verified answers
About the peripheral distribution of spinal nerves, in reference to the
Dorsal and Ventral Rami, what area of the body do they provide
innervation to? Ans✓✓✓The dorsal or posterior ramus of each spinal
nerve provides somatic and visceral motor fibers that innervate the skin
and skeletal muscles of the back.
Sensory and motor innervations of the skin and skeletal muscles of the
sides and front of the body are provided by the Ventral or Anterior
Ramus
Brachial plexus Ans✓✓✓The Ventral Rami of Spinal nerves C5-T1
Five major terminal branches found in this Plexus
1. Axillary nerve
2. Median nerve
3.Musculocutaneous nerve
4. Radial nerve
5. Ulnar nerve (from medial cord)
Cervical plexus: Ans✓✓✓Consist of C1-C5
The branches of the cervical region (plexus) innervate the muscles of the
neck and shoulder.
Coccygeal Plexus: Ans✓✓✓S4 to Co
, Define Dura Mater Ans✓✓✓The tough, fibrous Dura mater (dura, hard
mater, mother) is the layer that forms the outermost covering of the
spinal cord.
Define Epidural Space Ans✓✓✓A region that contains loose
connective tissue, some blood vessels, and a protective padding of
adipose tissue.
Located between the Dura mater and the walls of the vertebrae lies the
epidural space.
Define Nerve Plexus? Ans✓✓✓Converge or joining, the ventral rami of
adjacent spinal nerves are called Plexus.
The Plexus blend their fibers, producing a series of compound nerve
trunks, such a complex interwoven network
Define Spinal Meninges? Ans✓✓✓Is a series of specialized membranes
surrounding and protecting the spinal cord. They providing the
necessary physical stability and shock absorption.
Define the Innate. Provide an example of the stretch reflex?
Ans✓✓✓Innate reflexes
Reflexes resulting from the connections that forms between neurons
during development. Ex. Removal of hand from fire
Define: The Crossed Extensor Reflex? Ans✓✓✓The crossed extensor
reflex (polysinaptic) is called a contralateral reflex arc (contra, opposite),
because the motor response occurs on the side opposite the stimulus.
