Abdominal Wall & Pectoral Girdle Muscles

External Oblique, Internal Oblique, Transverse Abdominis, Rectus Abdominis

List all of the abdominal muscles from superficial to deep:

External Oblique Origin

Lower ribs

External Oblique Insertion

Iliac Crest

External Oblique Action

Tenses abdominal wall & compresses abdominal organs

Internal Oblique Origin

Ilium

Internal Oblique Insertion

Costal cartilage & pubic bone

Internal Oblique Action

Tenses abdominal wall & compresses abdominal organs

Transverse Abdominis Origin

Costal cartilage, L vertebrae, & ilium

Transverse Abdominis Insertion

Pubic bone

Transverse Abdominis Action

Tenses abdominal wall & compresses abdominal organs

Rectus Abdominis Origin

Pubic bone & pubic symphysis

Rectus Abdominis Insertion

Sternum & costal cartilage

Rectus Abdominis Action

Flexes vertebral column, tenses abdominal wall & compresses abdominal organs

External Oblique

Internal Oblique

Transverse Abdominis

Rectus Abdominis

Trapezius Origin

Occipital bone & C + T vertebrae

Trapezius Insertion

Clavicle & scapula

Trapezius Action

Rotates scapula & pulls scapula medially + down

Rhomboid Major Origin

Thoracic vertebrae

Rhomboid Major Insertion

Scapula

Rhomboid Major Action

Retracts, elevates, & rotates scapula

Rhomboid Minor Origin

Cervical vertebrae

Rhomboid Minor Insertion

Scapula

Rhomboid Minor Action

Retracts & elevates scapula

Levator Scapulae Origin

Cervical vertebrae

Levator Scapulae Insertion

Scapula

Levator Scapulae Action

Elevates the scapula

Serratus Anterior Origin

Upper Ribs

Serratus Anterior Insertion

Scapula

Serratus Anterior Action

Pulls scapula anteriorly & down

Pectoralis Minor Origin

Upper Ribs

Pectoralis Minor Insertion

Scapula

Pectoralis Minor Action

Raises ribs & pulls scapula anteriorly + down

Trapezius

Rhomboid Major

Rhomboid Minor

Levator Scapulae

Serratus Anterior

Pectoralis Minor