Spinal Plexuses

Question 1

Nerves emerging from Herb’s point

Answer 1

Lesser Occipital
Greater Auricular
Transverse Cervical
Supraclavicular

Question 2

Branches of Spinal nerve C1

Answer 2

C1: exclusively motor

Ventral branch:
-Nerve to Mylohyoid
-Nerve to Thyrohyoid
Branch to Superior root of Deep Ansa Cervicalis

Dorsal Branch

• Suboccipital nerve
  
  • the motor nerve to the suboccipital triangle muscles.
  • pierces the atlanto-occipital membrane.

Question 3

What innervates the infrahyoid muscles?

Answer 3

C1 innervates the thyrohyoid

The Deep Ansa Cervicalis innervates the:

• sternohyoid
• sternothyroid
• omohyoid

Question 4

What does the Lesser Occipital Nerve Arise from

and its function?

Answer 4

From C2/C3, the lesser root of Deep Ansa Cervicalis

Sensory to the occipital region

Question 5

Origin of Greater Auricular Nerve

Answer 5

C3

Question 6

Origin of Transverse Cervical Nerve

Answer 6

C3

Question 7

Roots o the Superficial Ansa Cervicalis

Answer 7

The Cervical branch of the Facial nerve

and

The Transverse Cervical nerve

Question 8

Origin of the Supraclavicular nerve

Answer 8

C3 and C4

Question 9

Origin of Phrenic Nerve

Answer 9

C4

Question 10

Origin of Subcostal nerve

Answer 10

T12

Question 11

Branches of the Lumbar Plexus

Answer 11

Subcostal
Iliohypogastric
Ilioinguinal
Genitofermoal
Lateral Femoral Cutaneous
Femoral  Nerve

Question 12

Branches of Sacral Plexus

Answer 12

Obturator 
Superior Gluteal
Inferior Gluteal
Sciatic Nerve
 --Common Fibular
 -- Tibial
Posterior Cutaneous Nerve of Thigh
Pudendal Nerve
Branches to the muscles of the pelvic floor
Coccygeal nerve
Anococcygeal nerve