FINAL- Anatomy of Respiration

Question 1

Name the 13 muscles of forced inspiration

Answer 1

1. External Intercostals
2. Levatores Costarum Brevis
3. Levatores Costarum Longis
4. Serratus Posterior Superior
5. Sternocleidomastoid
6. Scalenus
7. Subclavius
8. Pectoralis Major
9. Pectoralis Minor
10. Serratus Anterior
11. Levator Scapulae
12. Rhomboideus Major/Minor
13. Trapezius

Question 2

Diaphragm

Answer 2

Origin: vertebral column (7-12)

Insertion: central tendon

Function: central tendon pulled pulled downward

Innervation: Phrenic

Question 3

External Intercostals

Answer 3

Origin/Insertion: One rib to next

Function: pulls ribs towards first rib

Innervation: Intercostal nerve

Question 4

Levatores Costarum Brevis

Answer 4

Origin: C7-T11

Insert: rib immediately below

Function: Expansion

Innervation: Intercostal

Question 5

Levatores Costarum Longus

Answer 5

Origin: T7-T10

Insert: Two ribs below

Function: Expansion

Nerve: Intercostal

Question 6

Serratus Posterior Superior

Answer 6

Origin: C7-T3

Insert: Next lower rib

Function: Expansion

Nerve: Intercostal

Question 7

Sternocleidomastoid

Answer 7

Origin: Mastoid

Insert: Clavicle & Sternum

Function: Stabilizes upper thorax

Nerve: XI

Question 8

Scalenus

Answer 8

Origin: C2-C7

Insert: Ribs 1 & 2

Function: Balance head & anchor upper ribs

Nerve: Brachial Plexus

Question 9

Subclavius

Answer 9

Origin: Clavicle

Insert: First Rib

Function: Raise upper chest & stabilize first rib

Nerve: Brachial

Question 10

Pectoralis Major

Answer 10

Origin: Sternum & Clavicle

Insert: Humerus

Function: Sternum upward stabilize clavicle

Nerve: Bracial Plexus

Question 11

Pectoralis Minor

Answer 11

Origin: 2nd-5th rib

Insert: Scapula

Function: stabilize upper ribs

Nerve: Brachial

Question 12

Rhomboideus

Answer 12

Origin: C7-T5

Insert: Scapula Midline

Function: Anchor scapula

Nerve: Brachial

Question 13

Levator Scapulae

Answer 13

Origin: C1-C4

Insert: Scapula Midline

Function: Stabilize scapula anchoring serratus anterior superior & pectoralis minor

Nerve: Cervical

Question 14

Trapezius

Answer 14

Origin: C2-T12

Insert: Clavicle & Scapula

Function: Brace clavicle & scapula against other muscles

Nerve: XI