Muscles of Respiration

Question 1

Anterior Scalene

Answer 1

O - anterior tubercles, TVP’s C3-6
I - Scalene tubercle Rib 1
A - Flex neck, Lat Flexion, and Elevated Rib 1 @
N - Ventral Rami, C4-6

Question 2

Middle Scalene

Answer 2

O- Posterior Tubercles, TVP’s C2-7
I- Superior surface, Rib 1
A- FleX and Side- Flexion of neck and Elevates Rib 1 @ SC jt.
N- Ventral Rami C3-C8, Spinal N

Question 3

Posterior Scalene

Answer 3

O- Posterior Tubercles, TVP’s C5-7
I- Rib 2, external surface
A- LAteral Flexion, Elevation Rib 2
N- Ventral Rami Spinal nerves, C6-8

Question 4

Pectoralis Minor

Answer 4

O- Ant. surfaces, Ribs 3-5 near costocartilage jnctn
I- Medial aspect, Coracoid Process
A- Depression, Protraction, Dnwrd/ MdL ROT of Scap @ SC jt.
Raises Ribs
N- MEdial and Later Pectoral Nerves

Question 5

Serratus Anterior

Answer 5

O- Ribs 1-9, Anterolaterally
I- anterior surface, medial border of scapula
A- Protracts and upward ROT scapula @ SC jt.
N- Long Thoracic Nerve, C5-7

Question 6

Sternocleidomastoid - SCM

Answer 6

O- Manubrium of Sternum, Med. 1/3 Clavicle superior surface.
I- Mastoid Process of Temporal Bone
A- Flex, EXT, Lateral Flexion @ AOJ CONTRA ROT. of head @ AAJ Elevation of Sternum + Clavicle
N- Spinal accessory - CN XI

Question 7

Serratus Posterior Superior

Answer 7

O- SP’s C7-T3, Lower Nuchl Ligmnt
I- Ribs 2-5
A- Elevates Ribs 2-5
N- Intercostal Nerves