Basics
Point of attachment that moves when a muscle is contracted
Insertion
How many muscles does quiet inspiration require?
1
Puller _____
Downs
How many muscles does forced inspiration require?
Many muscles
The linea alba goes from _____ to _____?
From the xiphoid process to the pubic symphysis
Least mobile point of attachment
Origin
Primary muscle of inspiration
Diaphragm
What is continuous layer of connective tissue from the linea alba to the external oblique muscles ?
Rectus Sheath
Action of Pectoralis Major
Elevates sternum and rib cage
Action of Latisssimus Dorsi
stabilizes posterior abdominal wall for expiration
All muscles will produce an ______
Action!
Origin and Insertion of the external intercostals
Origin- lower surface of each rib (except 12)
Insertion- Upper surface of rib immediately below
Origin and insertion of Internal Oblique Abdominis
Origin:inguinal ligament and iliac crest
Insertion: linea alba
3 openings in the diaphragm
1. Aortic hiatus
2. Esophageal hiatus
3. Foramen vena cava
Latisssimus Dorsi action
stabilizes posterior abdominal wall for expiration
The 2 types of muscles involved in breathing
Primary and Accessory
Action of the Serratus Posterior Superior
Elevates ribs 2-5 specifically
Subcostals origin, insertion, and action
Origin: inner thorax, inner surface of rib near angle
Insertion: inner surface of second or third rib below
Action: depresses thorax
Origin and insertion of Trapezius
Origin: spinous processes of C2 to T12
Insertion: scapula and superior surface of clavicle
List the 4 parts of the Abdominal aponeurosis
1. Linea Alba
2. Rectus Sheath
3. Linea Semilunaris
4. Inguinal Ligament
What one task do muscles perform?
Shortening
Levatores Costarum (both brevis and longus portion) origin, insertion, and action
Brevis Portion
Origin: transverse process of vertebrae C7 through T11 (total of 12 muscles)
Insertion: tubercle of the rib below
Longus Portion
Origin: transverse process of T7 through T11
Insertion: bypass the rib below the points of origin and insert into the next rib
Action: raises ribs
Quadratus Lumborum origin, insertion, and action
Origin: iliac crest
Insertion: transverse processes of the lumbar vertebrae and inferior border of rib 12
Action: pulls last rib down, fixes rib cage inferiorly
Sternocleidomastoid origin, insertion, and action
Origin: mastoid process of temporal bone
Insertion: sternal head and clavicle
Action: elevates sternum and rib cage
Serratus Posterior Inferior origin, insertion, and action
Origin: spinous processes of T11-T12 and L1-L3
Insertion: lower margin of ribs 7-12
Action: muscles pull the rib cage down