Unit 3.8 Flashcards
The epineurium surrounds the
The perineurium is found around
Endoneurium is found
Entire nerve
Nerve fascicles
Between individual nerve axons
The spinal nerves provide sensory and motor innervation to the
Trunk and appendages
The dorsal rami is comprised of
Fibers course dorsal to supply
Ventral rami are comprised of
Fibers course ventrally to the
1/3 of a spinal nerve bundle
Skin and muscles of the posterior trunk
2/3 of a spinal nerve bundle
Skin and muscles of the anterior trunk and appendages
Most nerves exit at the
C1-C8 are named vertebrae that are exiting
T1-S5 are named for they exit
Intervertebral space below the vertebrae for which they are named
Above
Below
There are _ cervical spinal nerves
There are _ cervical vertebrae
The spinal nerves above vertebrae C5 is
c7
T1
8
7
C5
C7
C8
There are _ thoracic spinal nerves
_ thoracic vertebrae
Spinal nerve above vertebrae T6 is
Below
Above T12
Below
12
12
T5
T6
T11
T12
There are _ lumbar spinal nerves
- lumbar vertebrae
The spinal nerve above L1 is
Below L1 is
Above vertebrae L5 is
Below
5
5
T12
L1
L4
L5
There are _ sacral spinal nerves
_ sacral vertebrae
Sacral spinal nerves exit the sacrum through the
The spinal nerve above vertebrae S1 is
Below
5
5
Dorsal and ventral sacral foramen
L5
S1
There is _ coccygeal spinal nerves
_ coccygeal vertebrae
They exit _ their respective vertebrae
1
3
Below
Plexi mean
After spinal nerves exit their respective intervertebral foramen fibers can be
Plexi are associated with areas of
The braids allow for multiple spinal levels to innervate the discrete areas of
This provides a small measure of protections of innervation if
Braid
Intermingle between nerves
Enlargement of the spinal cord
Skin and the same muscles to appendages
Spinal cord be damaged
Cervical plexus (C1-4) provides innervation to the
The nerve roots that innervate the diaphragm include
Neck region and diaphragm
C3,4,5 - phrenic nerve
The brachial plexus is found in the _ and composed of the
It transmits from thoracic rib cage as a single neural bundle within a
Excision of the connective tissue unfurls the
Axillary region
Lower cervical and upper thoracic spinal roots (C5-T1)
Neurovascular bundle
Spinal nerves
The lumbosacral plexus (L1-S4) is a weaving of fibers between the
Is found in the
Forms the
Lumbar and sacral plexi
Abdominal cavity and is composed of the upper spinal roots (L1-L4)
Femoral and obturator nerves
The sacral plexus is found at the
Exits the pelvic cavity at the
Supply’s the
Pelvic cavity and is composed of two lumbar and all sacral spinal roots (L4-S4)
Greater sciatic notch as the sciatic nerve
Posterior thigh and all compartments of the leg, deep rotators of the hip and pelvic contents with specific spinal nerve roots
The radial nerve courses from
Is found at
Innervates
Anterior to posterior
Radial groove of the humerus
All posterior muscles of the upper appendages (muscles that extend the upper body)
The muscultaneous nerve is found in
Innervates the
Coracobrachialis
Anterior muscles proximal to the elbow (flex the shoulder and elbow)
The median nerve courses
Innervates
Distal with the ulnar nerve and be isolated at the cubical region
Most muscles of the anterior compartment of the forearm and palate muscles of the hand (flex the carpus/ digits and AB hand)
The ulnar nerves courses
Innervates
Distal with the medial nerve and is isolated at the medial epicondyle of the humerus
Medial muscles of the anterior compartment of the forearm
(Flex and adduct the carpus / digits)
Femoral nerve courses
Innervates
Under the initial ligament to exit the abdominal cavity
The anterior muscles of the thigh (flex hip extend knee)
Obturator nerve courses through the
Innervates the
Obturator foramen to exit the abdominal cavity
The medial (adductor) thigh
Sciatic nerve is two nerves which are
Exits the pelvic cavity through the
Innervates the
Tibial and common fibular wrapped in epineurium
Greater sciatic foramen
Posterior compartment of thigh and all leg (extend hip flex knee)
Tibial nerve courses
Becomes isolated from the _ posterior to the knee, the poplitwal region, and courses between the two heads of the _
Innervates
Distal has the sciatic nerve
Fibular
Gastrocnemius
Posterior compartment of the leg (plantar flexors, flexor of the digits)
Common fibular nerve courses
Becomes isolated from the _ in the popliteal space and courses lateral where it follows the contour of the neck of the fibula
Bifurcates into the
Innervates
Distal has the sciatic nerve
Tibial
Superficial and deep fibular nerves
Muscles of the lateral and anterior compartments of the leg
Superficial fibular nerve enters the
Innervates the
Lateral compartment of the leg
Fibularis longus and fibularis brevis that act to evert the foot
The deep fibular nerve enters the
Innervates
Anterior compartment of the leg
Muscles that dorsiflex the ankle, extend digits, Tibialis anterior and peroneus terius)
