Cervical plexus

Question 1

What forms the cervical plexus ?

Answer 1

The anterior rami of C1 - C4

Question 2

What does each nerve divide into?

Answer 2

Each nerve, except the first, divides

into upper & lower branch

Question 3

What does the cervical plexus receive?

Answer 3

Receives a grey rami communicantes

from superior cervical ganglion

Question 4

What does the cervical plexus lie in?

Answer 4

Lies in series with brachial plexus (on
scalenus anterior & behind
preveterbral fascia )

Question 5

What do the branches of the cervical plexus do?

Answer 5

Branches unite to form three loops.

Question 6

Where is the cervical plexus located?

Answer 6

Situated opposite upper 4 cervical

vertebrae

Question 7

What does the cervical plexus lie on?

Answer 7

Lies on scalenus medius, plastered
down by prevertebral fascia &
covered by SCM[sternocleidomastoid]

Question 8

What groups does the branches of the cervical plexus divide?

Answer 8

Branches divide into superficial &

deep groups

Question 9

MUSCULAR BRANCHES : Segmental branches to prevertebral muscles :

Answer 9

• Longus capitus
• Longus colli
• Scalenes

Question 10

C1 loop (to hypoglossal):

Answer 10

Superior Root
of Ansa Cervicalis supply :
• Infrahyoid muscles
• Nerves to thyrohyoid & geniohyoid

Question 11

MUSCULAR BRANCHES - Branches from C2 & 3:

Answer 11

Sternocleidomastoid

Question 12

Branches C3 & 4

Answer 12

Trapezius

Question 13

C2 & 3 :

Answer 13

• Inferior Root of Ansa cervicalis
• This root spirals around the lateral side
of the internal jugular vein.

Question 14

What is the cervical plexus?

Answer 14

A collection of cervical nerve formed by the anterior/ventral rami

Question 15

The cervical plexus gives off branches :

Answer 15

Anterior branches - motor

Posterior branches - sensory