Cat Disection Muscles

Superficial muscles of back/shoulder

Trapezius, Latissimus dorsi, Deltoid, Rhomboideus

Trapezius Function

Rotates, elevates and retracts scapula

Latissimus dorsi Function

Extends, adducts and medially rotates arm

Latissimus dorsi origin-Spine

Spine

Latissimus dorsi insertion

Bicipital groove of humerus

Deltoid Function

Abducts arm

Rhomboideus Function

Retracts scapula

Superficial chest muscles

Pectoralis major, Pectoralis minor

Pectoralis major Function

Flexes and adducts arm

Pectoralis major origin

Clavicle

Pectoralis major insertion

Bicipital groove of humerus

Pectoralis minor Function

Elevates ribs

Deep Muscles of the chest

Serratus ventralis (serratus anterior), External intercostals

Serratus ventralis (serratus anterior) Function

Laterally rotates and protracts scapula

External intercostals Function

Fix intercostal spaces during respiration, aid with elevating ribs

External intercostals origin

Inferior border of ribs

External intercostals insertion

Superior border of ribs

Muscles of the abdominal wall

Rectus abdominis, External oblique, Internal oblique, Transverse abdominis

Rectus abdominis Function

Flexes trunk

Rectus abdominis origin

Pubic crest and symphysis

Rectus abdominis insertion

Costal cartilage (bottom ribs)

External oblique Function

Supports abdominal wall

Internal oblique Function

Supports abdominal wall

Transverse abdominis Function

Supports abdominal wall