cervical nerves

Question 1

what are the sensory branches of the cerical plexus and what nerve roots supply them

Answer 1

• lesser occipital (C2)
• transverse cervical (C2,C3)
• greater auricular (C2,C3)
• supraclavicular (C3,C4)

Question 2

what nerve roots supply the phrenic nerve

-what is the function of the phrenic nerve

Answer 2

• C3,C4,C5
• motor to diapgram and medistinal pleura
• sensory from peridarium

Question 3

what nerve roots supply ansa cervicalis

-what is the function of the ansa cervicalis

Answer 3

• C1,C2,C3

- motor innervation to infrahyoid muscles

Question 4

what is the function of preganglionic neurons

Answer 4

send sympathic info from the spinal cord to paravertebral ganglia

Question 5

what is the function of post ganglionic neurons

Answer 5

send sympatatic infro from paravertebral ganglion to other places in body

Question 6

what is the function of white communicans

Answer 6

• contain preganglionic axons

- connect paravertebral ganglia to ventral rami

Question 7

what is the functin of the grey communicans

Answer 7

• contain post ganglionic axons

- connect paravertebral ganglia to ventral rami

Question 8

two pathways of inferior and middle cervical ganglion

Answer 8

• thru grey ramus to go to upper limb via brachial plexus

- bi pass grey rmaus and go directly to cardiac and pulmonary plexi

Question 9

three pathways of superior cervical ganglion

Answer 9

• pass thru grey ramus to go to neck via cervical plexus
• make up carotis plexus
• bi pass grey ramus and go directly to cardiac and pulmonary plexi