Neck Muscles

Question 1

Trapezius

Answer 1

Origin: Occipital bone & C7-T5 & T5-T12
Insertion: Lateral 1/3 of clavicle, acromion, spine of scapula
Function: Elevation & adduction & upward rotation of scapula, Stabilization of scapula for arm movements.
Innervation: CN11: accessory nerve

Question 2

Levator Scapulae

Answer 2

Origin: transverse process of C1-C4
Insertion: Medial border of scapula
Function: Elevation of scapula & extension & lateral flexion of neck
Innervation: Dorsal scapular nerve

Question 3

Splenius Capitis

Answer 3

Origin: Spinous process of C3-T4
Insertion: Mastoid process of temporal bone & occipital bone
Function: Extension & Rotation & Lateral Flexion of head and neck
Innervation: Cervical Spinal Nerves

Question 4

Splenius Cervicis

Answer 4

Origin: Spinous process of T3-T6
Insertion: Transverse process of C1-C3
Function: Rotation & Lateral Flexion & Extension of head and neck
Innervation: Cervical Spinal Nerves

Question 5

Sub-Occipitals - Rectus Capitis Posterior Major

Answer 5

Origin: Spine of Axis (C2)
Insertion: Lateral portion of inferior nuchal line (Occipital Bone)
Function: Extension, rotation, lateral flexion of the head
Innervation: Suboccipital nerve

Question 6

Sub-Occipitals - Rectus Capitis Posterior Minor

Answer 6

Origin: Posterior tubercle of atlas (C1)
Insertion: Medial portion of the nuchal line (Occipital Bone)
Function: Extension & lateral flexion of the head
Innervation: Suboccipital nerve

Question 7

Sub-Occipitals - Obliquus Capitis Superior

Answer 7

Origin: Transverse process of atlas (C1)
Insertion: below inferior nuchal line (occipital bone)
Function: Extension, rotation, lateral flexion of the head
Innervation: Suboccipital nerve

Question 8

Sub-occipital - Obliquus Capitis Inferior

Answer 8

Origin: Spine of Axis (C2)
Insertion: Transverse process of atlas (C1)
Function: Extension & rotation of the head
Innervation: Suboccipital nerve

Question 9

Sternocleidomastoid (SCM)

Answer 9

Origin: Manubrium of sternum & Clavicle
Insertion: occipital & temporal bone
Function: Flexion, rotation, lateral flexion
Innervation: CN11 (accessory nerve)

Question 10

Longus Colli

Answer 10

Origin: Transverse Process C3 & C5, T1 & T3
Insertion: C1, C5 & T3
Function: Flexion, Lateral Flexion, Rotation of the neck
Innervation: Cervical Ventral Spinal Rami

Question 11

Anterior Scalene

Answer 11

Origin: Transverse processes C3-C6
Insertion: First rib
Action: Flexion and Lateral Flexion of the neck
Innervation: Cervical Ventral Spinal Rami

Question 12

Middle Scalene

Answer 12

Origin: Transverse processes C2-C7
Insertion: First rib
Action: Lateral Flexion of the neck
Innervation: Cervical Ventral Spinal Rami

Question 13

Posterior Scalene

Answer 13

Origin: Transverse process C5-C7
Insertion: Second rib
Action: Lateral Flexion of the neck
Innervation: Cervical Ventral Spinal Rami