Group 2

Question 1

Rhomboideus

Answer 1

O: Nuchal + Dorso-scapular ligs from C2-T8
I: Medial scapula cartilage
F: Draw scapula dorsally + cranially; elevates neck
N: Local thoracic + Cervical nn.

Question 2

Serratus ventralis cervicis

Answer 2

O: TPs of C4-C7
I: Scapular cartilage + Facies serrata of the scapula
F: Suspends trunk; raises neck when forelimb is fixed; may support inspiration
N: Ventral branches local cervical nn.

Question 3

Serratus ventralis thoracis

Answer 3

O: First 8-9 ribs
I: Scapular cartilage + Facies serrata of the scapula
F: Suspends trunk; raises neck when forelimb is fixed; may support inspiration
N: Long thoracic n.

Question 4

Trapezius

Answer 4

O: Nuchal + Supraspinous ligaments from C2-T10
I: Thoracic part; Dorsal 1/3 of scapula spine
Cervical part; Entire scapula spine
F: Elevates shoulder: draws scapula craniodorsally + caudodorsally
N: Dorsal branch of accessory n.

Question 5

Splenius

Answer 5

O: Spinous processes T3-T5 via thoracolumbar fascia: Nuchal ligament
I: Nuchal crest, mastoid process, TPs C2-C5
F: Elevates/extends + laterally bends head + neck
N: Dorsal branches C3-C8 + dorsal branch of accessory n.

Question 6

Semispinalis capitis

Answer 6

O: TPs T1-T6/T7 via dorsoscapular ligaments, articular processes of C3-C7
I: Occipital bone
F: Unilateral: Rotation + lateral flexion of neck
Bilateral: extensor of poll + neck
N: Dorsal branches of local spinal nn.

Question 7

Sternocephalicus

Answer 7

O: Manubrium sterni
I: Caudal border of mandible
F: Opens mouth. Flexes or inclines head + neck to side of muscle
N: Ventral branch of accessory n.

Question 8

Brachiocephalicus

Answer 8

O: Crest of humerus
I: Mastoid process of temporal bone
F: Flexes neck. Unilateral action bends neck laterally, protracts limb if neck is fixed
N: Axiliary and Accessory n.

Question 9

Omotransversarius

Answer 9

O: Shoulder fascia
I: TPs C2-C4
F: Protracts limb; bends neck laterally
N: Local Cervical nn.