Peripheral Nerves

Front 1

There are 8

Back 1

cervical nerves

Front 2

there are 12

Back 2

thoracic nerves

Front 3

there are 5

Back 3

lumbar nerves

Front 4

there are 5

Back 4

sacral nerves

Front 5

there is 1

Back 5

Coccygeal nerve

Front 6

Enlargement due to arms

Back 6

cervical

Front 7

enlargement due to legs

Back 7

lumbar

Front 8

End of spinal cord

Back 8

conus medullaris

Front 9

Pia that anchors spinal cord to coccyx

Back 9

filium terminale

Front 10

spinal roots exiting the vertebral column

Back 10

cauda equina

Front 11

each spinal nerve connects spinal cord via two

Back 11

roots

Front 12

short spinal nerves that branch into three or four mixed

Back 12

rami

Front 13

2 rami

Back 13

ventral and dorsal

Front 14

Which rami form plexus?

Back 14

ventral

Front 15

network or interlacing net of nerves

Back 15

plexus

Front 16

Most important nerve of cervical plexus

--major motor and sensory nerve of diaphragm

Back 16

Phrenic nerve

Front 17

which area of the s.c. does not have a plexus?

Back 17

Thoracic

Front 18

Name the 4 divisions of the brachial plexus?

Back 18

roots

trunks

divisions

cords

Front 19

five ventral rami of brachial plexus?

Back 19

roots

Front 20

upper, middle and lower of brachial plexus?

Back 20

Trunks

Front 21

Anterior, medial and posterior portions of brachial plexus

-serve the front and back of limb

Back 21

Divisions

Front 22

continuation of trunks (sort of)

-later, medial and posterior fiber bundles

Back 22

cords

Front 23

brachial plexus nerve that:

innervates deltoid and teres minor (shoulder muscles)

Back 23

axillary

Front 24

Brachial plexus nerve:

sends fibers to biceps brachii, and brachialis

Back 24

musculocutaneous

Front 25

brachial plexus nerve:

-branches to flexor muscles of arm

Back 25

median

Front 26

brachial plexus nerve:

-supplies stuff to pinky and ring finger

Back 26

ulnar

Front 27

brachial plexus nerve:

-innervates extensors of radial nerve

-good basketball shooting form

Back 27

radial

Front 28

Nerve for knee extension

Back 28

femoral nerve

Front 29

nerve for adducting leg

-towards the middle line

Back 29

obturator nerve

Front 30

the mother of all nerves

Back 30

sciatic nerve

Front 31

sciatic nerve is made up of which two nerves

Back 31

tibial and common fibular

Front 32

which nerve has to do with hamstrings, calf muscles and foot muscles?

Back 32

tibial nerve

Front 33

which nerve causes dorsi flexion?

Back 33

common peroneal or fibular

Front 34

area of skin supplied by single spinal segment?

Back 34

dermatomes

Front 35

what are 4 special skin landmark dermatomes?

Back 35

nipple line

xiphoid process

umbilicus

groin

Front 36

Any nerve serving a muscle that produces movement at a joint also innervates the joint itself.

-example of...?

Back 36

Hilton's law

Front 37

rapid, predictable motor respons to a stimulus

-inborn or learned

Back 37

reflex

Front 38

name four properties of somatic reflexes

Back 38

stimulus

quick

involuntary

stereotyped-occur the same way

Front 39

inform brain as to state of muscles
-keep muscles and tendons from tearing
-too much tension results in inhibition of muscle causing the tension

Back 39

Golgi tendon organs

Front 40

proprioceptors that regulate the tension places on skeletal muscle

-stretch reflex is initiated by these

-more of these in tactile areas like hands

Back 40

muscle spindles

Front 41

muscle fibers that can contract

Back 41

intrafusal

Front 42

normal muscle cells

Back 42

extrafusal

Front 43

knee jerk reaction

-stretching activates muscle spindles

-stretched muscle contracts

-tapping knee stretches the quadriceps

-hamstring relaxes

Back 43

stretch reflex

Front 44

abnormal plantar reflex indicating corticospinal (motor) damage

Back 44

Babinski's sign