Spinal Nerves Flashcards
• The first cervical nerve passes through the .., .
lateral vertebral foramen of the atlas
The number of spinal nerve pairs in each section of the vertebral column corresponds
to the number of vertebrae True/False
False(the exception of the cervical spine and the tail.)
There are eight cervical spinal nerves for seven cervical vertebrae.
True/False
True
• In the coccygeal region, there are fewer nerves than vertebrae.
True/ False
True
• Each spinal nerve originates from the spinal cord with a…….and …….
Dorsal and ventral branch.
The two roots unite within the vertebral canal to form the………
the spinal nerve
Close to the union of the two roots the dorsal root carries the spindle-shaped spinal
ganglion that consists of the cell bodies of
afferent, pseudounipolar neurons.
The dorsal root is composed …… fibres, while the ventral root is composed of
afferent, efferent motor and autonomous fibres.
The mixed spinal nerve exits through the intervertebral foramen and
divides almost immediately into branche
dorsal and ventral
The dorsal branch
of the spinal nerve further divides into a
medial branch (for the innervation of the muscles of the back) and a lateral branch (for the skin of the back
Cutaneous segments which are innervated by a particular spinal nerve are designated
Dermatomes
Dermatomes supply the
Skin
The larger ventral branch of the spinal nerve innervates what muscles
Muscles ventral to the transverse processes and the remains skin, including the limbs.
The ventral branches of the spinal nerves divides into two primary branches which arise in the …….&……….,
Middle of the abdomen and the second close to the linear alba.
Brachial plexus comprise of
Ventral branches of the last three cervical nerves, and the first two thoracic nerves.
The brachial plexus gives rise to the …..
Nerves of the forelimb
The last three lumbar nerves and the first two sacral nerves form the …….
Lumbosacral plexus of the hind limb
The dorsal and ventral cervical nerve communicates with each other to form
the dorsal and ventral cervical plexus.
The ventral branch of the first cervical nerve joins the hypo glossal nerve to form branches that innervate the….
Long muscles of the hyoid apparatus; the sternohyoid, the sternothyroid and the omohyoid muscle
The ventral branch of the second cervical nerve detaches the
great auricular nerve (which innervates the caudal par of the ear after joining the caudal auricular branch of the facial nervd)
The ventral roots of the fifth (cat:fourth) to seventh cervical nerves form the
Phrenic nerve.
The phrenic nerve runs caudal ly within the mediastinium to innervate the ………….
Diaphragm
The supra clavicular branches also arise from a)……. and innervates the ……..
a) ventral branches of the cervical nerve and innervates the skin over the shoulder joint
What are the branches of the Brachial Plexus
Long Thoracic Nerve.
- Thoracodorsal nerve
- Lateral thoracic nerve
- Cranial and caudal pectoral nerve
- Subscapular nerves.
Where is the long thoracic nerve located.
It passes caudally on the lateral surface of the thoracic part of the ventral serrate muscle.
The location of the thoracodorsal nerve is?
Arises from the last cervical spinal nerve to innervate the broadest muscle of the back
Give the direction and innervation of The lateral thoracic nerve
Arisres from the Caudal part of plexus and innervates the abdominal cutaneous muscle,,,_and the skin caudal to the triceps
The cranial and caudal pectoral nerve innervates…
The superficial pectoral muscle and the deep pectoral muscles.
The subscapular nerve innervates
Cranial and middle part of the subscapular muscle.
What are the branches of the brachial plexus with relatively limited distribution
Suprascapular nervr, muscle I cutaneous nerve and the axillary nerve.
What nerve (branch) of the brachial plexus run parallel to the median nerve?
Musculocutaneous nerve
The musculocutaneous branch joins the median branch in ungulates to form a loop around the …………. artery
Axillary artery.
The musculocutaneous nerve innervates which muscles?
Coracobrachial muscle and the biceps muscle.
………….nerve divides to form the median nerve that supplies the brachial muscles and the skin on the medial antebrachium.
Musclelocutaneous branch.
True or false lesions of the muscle I cutaneous nerve can be compensated for by the radial nerve.
True.
Lessions f the musculo cutaneous nerve would cause?
Paralysis of the main flexors of the elbow
…………….. can be an indicator of musculocutaneous nerve damage.
Loss of sensation if the skin on the medial aspect of the antebrachium
The suprascapular nerve innervates the ……….
Supraspinous and the infraspinous muscles
True or false the suprascapular nerve is vulnerable to traumatic damage?
True. Because of it’s close relationship to the scapula
Paralysis of the suprascapular nerve causes ……..
Atrophy of the suprascapular and infrascapular muscles.