Anatomy Ch. 16 Spinal Chord

Front 1

How long is the spinal chord and what is the diameter

Back 1

42-45 cm
15 mm

Front 2

What are the two grooves that the spinal chord has

Back 2

posterior median sulcus and anterior median fissure

Front 3

How far does the grey matter extend inferiorly

Back 3

to the upper lumbar vertebrae, which marks the end of the spinal chord proper

Front 4

What is below the spinal chord proper

Back 4

cauda equina, which consists of groups of axons that will form the more inferior spinal nerves

Front 5

Where are neurons organized

Back 5

Within the gray matter

Front 6

What part of the spinal chord contains the cell bodies of somatic motor neurons

Back 6

Anterior horn

Front 7

What part of the spinal chord contains the cell bodies of the autonomic motor neurons

Back 7

lateral horn

Front 8

What part of the spinal chord contains cell bodies of interneurons receiving somatic and visceral sensory information

Back 8

posterior horn

Front 9

What are the different regions of the spinal chord

Back 9

1. cervical
2. thoracic
3. lumbar
4. sacral
5. coccygeal

Front 10

This region of the spinal chord is continuous with the medulla oblongata, has motor neurons of the cervical spinal nerves. Also contains the cervical enlargement, where there are more neurons, for the control of the upper limbs

Back 10

cervical region

Front 11

What do you call the thing that takes CSF from subarachnoid space, to look for infection or other CNS disorders

Back 11

Spinal Taps

Front 12

How many pairs of spinal nerves are there

Back 12

31

Front 13

Contain thousands of motor neurons axons. These axons leave the spinal chord in anterior rootlets, which combine to form the anterior root

Back 13

Anterior roots

Front 14

Contain thousands of sensory neuron axons

Back 14

Posterior roots

Front 15

what does ramus mean

Back 15

branch

Front 16

This branch or ramus is a small branch that innervates the muscles and skin of the back

Back 16

posterior ramus

Front 17

a large branch, that branches several more times to innervate the anterior and lateral portions of the trunk

Back 17

Anterior ramus

Front 18

What do you call branches of the autonomic nervous system that connects the spinal chord to sympathetic chain ganglia

Back 18

Rami Communicants

Front 19

This region of the skin is innervated by a spinal nerve

Back 19

Dermatomes

Front 20

these are interweaving of the anterior rami of spinal nerves

Back 20

Plexuses

Front 21

What are the main plexuses

Back 21

1. cervical
2. brachial
3. lumbar
4. sacral

Front 22

this is a bulge in posterior root and contains the cell bodies of the sensory neurons

Back 22

Posterior root ganglion

Front 23

What do you call t1-t11

Back 23

Intercostal nerves

Front 24

What do you cal T12

Back 24

subcostal nerves

Front 25

Which thoracic nerve forms plexuses (all the rest do not form plexuses)

Back 25

T1

Front 26

What type of innervation is intercostal muscles and abdominal muscles (Thoracic plexus)

Back 26

motor

Front 27

What type of innervation is skin of chest, sides and back (thoracic plexuses)

Back 27

sensory

Front 28

This makes up the cervical plexus

Back 28

C1-C4

Front 29

What type of innervation exists for the cervical plexuses

Back 29

Motor-anterior neck muscles, Diaphragm via the phrenic nerve
Sensory- skin of neck, parts of head and shoulders

Front 30

What plexuses has
C5,C6,C7,C8, and T1

Back 30

Brachial plexuses

Front 31

What does the brachial plexuses form

Back 31

Three cords
1. lateral
2. medial
3. posterior

Front 32

What specific brachial nerve innervates anterior forearm muscles (motor) and palm of hand (sensory)

Back 32

Median nerve

Front 33

What specif brachial nerve innervates the posterior arm (triceps brachii0 and forearm extensor) (motor) and skin of posterior forearm (sensory)

Back 33

Radial nerve

Front 34

What specific brachial nerve innervates intrinsic hand muscles (motor) and senses pinky and ring finger (medial digits)

Back 34

ulnar nerve

Front 35

This plexus is formed from L1-L4

Back 35

Lumbar plexuses

Front 36

What nerve comes from the lumbar plexuses

Back 36

Femoral

Front 37

Formed from L4-L5

Back 37

Sacral plexuses

Front 38

What nerve does the sacral plexuses form

Back 38

Sciatic which branches into tibial and fibular

Front 39

This sacral plexuses nerve innervates posterior thigh and leg muscles and senses sole of foot

Back 39

Tibial nerve

Front 40

This sacral plexuses nerve innervates the anterior and lateral leg muscles and senses the lateral leg and dorsum of the foot

Back 40

Fibular nerve