Cat Dissection Muscles (Super Quiz #1) (Muscles of the Superficial/Deep Chest and Abdomen, Superficial/Deep Shoulder and Dorsal Region)

Pectoantebrachialis

A strip of muscle running from the manubrium to the superficial fascia of the forearm

Pectoralis Major

From the sternum to the humerus, forming a sheet deep to the pectoantebrachialis

Pectoralis Minor

From the sternum to the humerus, seeming to glide up under the pectorals major; in cats, it is a heftier muscle than the pectorals major

Xiphihumeralis

From the xiphoid process to the humerus; fusing to the pectorals minor

External Oblique

Large sheet of muscle with diagonal fibers covering most of the abdomen

Linea Alba

White abdominal midline

Rectus Abdominis (Letter B of Picture)

Longitudinal muscle extending from the pubis to the sternum and costal cartilages (Letter B of Picture)

Internal Oblique

Immediately deep to the external oblique; Fibers of the external and internal obliques form a 90º angle

Transversus abdominis

Transverse fibers immediately deep to the internal oblique

Serratus ventralis

Large fan-like muscle arising from the ribs and inserting on the vertebral border of the scapula

Transversus costarum

Arising from the sternum and inserting on the first rib

External intercostals

Series of muscles between the ribs, immediately deep to the transversus costarum

Scalenus

Two-part muscle lateral the transversus costarum

Levator scapulae

Lateral muscle used to raise the scapula

Subscapularis

Found on the back wall looking inside of the deep muscles; extends from the sub scapular fossa to the lesser tubercle of the humerus

Clavotrapezius

Flat, shoulder-covering muscle originating on the crest of the skull and inserting in the region of the clavicle

Clavodeltoid

Extending from the clavicle to the ulna; seemingly looks like an extension of the clavotrapezius

Acromiodeltoid

Just inferior to the acromiodeltoid, extending from the scapula to the spinodeltoid muscle

Acromiotrapezius

Flat muscle just caudal (posterior) to the clavotrapezius, originating from the cervical and thoracic vertebrae and inserting on the scapular spine

Spinotrapezius

Flat muscle just caudal (posterior) to the acromiotrapezius, originating at the spines of the thoracic vertebrae and inserting on the fascia of the scapular muscles

Spinodeltoid

Muscle seeming to be a continuation of the spinotrapezius, extending up under the acromiodeltoid, from the scapula to the humerus

Latissimus dorsi

Large flat muscle with diagonal fibers extending from the lumbardorsal fascia, around the lateral part of the body, and onto the humerus

Rhomboideus major

Rostral (frontal) muscle extending from midback to the medial border of the scapula

Rhomboideus minor

Rostral (posterior) muscle extending from mid back to the medial border of the scapula

Rhomboideus capitis

Longitudinal muscle lateral to the rhomboideus and inserting on the angle of the scapula

Splenius

Flat muscle lateral to the rhomboideus

Supraspinatus

Superior of two muscles covering the scapula; more rostral (frontal)

Infraspinatus

Inferior of two muscles covering the scapula; more causal (posterior)

Teres major

Running from the medial border of the scapula to the humerus

Teres minor

Deeper muscle extending from the lateral border of the scapula to the greater tubercle of the humerus

Serratus dorsalis

Two sets of muscles, superior and inferior, fanning out from the ribs

Sacrospinalis

Collective term for several longitudinal muscle masses

Triceps brachii (Lateral head) (#2 on picture)

Crosses the brachium from the scapula and humerus to the olecranon process of the ulna; Found on the lateral side

Triceps brachia (Long head) (#3 on picture)

Crosses the brachium from the scapula and humerus to the olecranon process of the ulna; Found on the caudal (posterior) side