23. Cervical Plexus

Question 1

Identify 1 - 2

Answer 1

1. Ansa cervicalis
2. Transverse cervical nn.

Question 2

Identify 3

Answer 2

3. Supraclavicular nn.

Question 3

Identify 4 - 5

Answer 3

4. Lesser occipital n.
5. Great auricular n.

Question 4

Cervical Plexus Arises from ____ and is divided into 2 parts

Answer 4

the ventral rami of C1-4

Question 5

Cervical Plexus Arises from the ventral rami of C1-4 and is divided into 2 parts

→ What are they?

Answer 5

1. Ansa Cervicalis (motor component)
2. Cutaneous Branches (sensory component)

Question 6

Cervical Plexus Arises from the ventral rami of C1-4 and is divided into 2 parts

→ What are they? Which one is motor component and which one is sensory component?

Answer 6

1. Ansa Cervicalis (motor component)
2. Cutaneous Branches (sensory component)

Question 7

Ansa Cervicalis (motor component)

→ Source?

Answer 7

Ventral rami of C1-3

Question 8

Cutaneous Branches (sensory component) of cervical plexus

→ Supraclavicular nerve → Source?

Answer 8

Cervical plexus formed by contributions of ventral rami C3 and C4

Question 9

Ansa Cervicalis (motor component) of cervical plexus Innervates the ___ (3 muscles)

Answer 9

• Omohyoid
• Sternohyoid
• Sternothyroid

Question 10

2 divisions of Ansa Cervicalis (motor component)

Answer 10

Superior root (descendens hypoglossi)—arises from ventral ramus of C1

Inferior root (descendens cervicalis)—arises from ventral rami of C2 and C3

Question 11

2 divisions of Ansa Cervicalis (motor component)

• Superior root (descendens hypoglossi)—arises from _____
• Inferior root (descendens cervicalis)—arises from ____

Answer 11

• ventral ramus of C1
• ventral rami of C2 and C3

Question 12

Cutaneous Branches (sensory component) of cervical plexus

→ Lesser occipital nerve → Source?

Answer 12

Cervical plexus by contributions from ventral ramus of C2

Question 13

Cutaneous Branches (sensory component) of cervical plexus

→ Lesser occipital nerve Continues on head posterior to ____ supplying ____

Answer 13

• auricle
• the skin in region

Question 14

Cutaneous Branches (sensory component) of cervical plexus

→ Great auricular nerve → Source?

Answer 14

Cervical plexus formed by contributions of ventral rami C2 and C3

Question 15

Cutaneous Branches (sensory component) of cervical plexus

→ Transverse cervical nerve → Source

Answer 15

Cervical plexus formed by contributions of ventral rami C2 and C3

Question 16

Cutaneous Branches (sensory component) of cervical plexus

→ Supraclavicular nerve

→ Divides into three major branches

→ What are they?

Answer 16

Medial supraclavicular
Middle supraclavicular
Lateral supraclavicular