Cat Muscles - Hypaxial Muscles

Question 1

External Oblique

Answer 1

Origin: Lumbodorsal fascia and posterior ribs
Insertion: Linea alba
Action: compress/constrict abdomen

Question 2

Internal Oblique

Answer 2

Origin: Lumbodorsal fascia and border of pelvic girdle
Insertion: Linea alba
Action: Compress or contract the abdomen

Question 3

Transversus abdominis

Answer 3

Origin: Lumbodorsal fascia and border of pelvic girdle
Insertion: Linea alba
Action: Compress or constrict the abdomen

Question 4

Rectus abdominis

Answer 4

Origin: Pubis
Insertion: Sternum and costal cartilages
Action: Compress or constrict the abdomen

Question 5

Serratus Abdominis

Answer 5

Origin: Pubis
Insertion: Sternum and costal cartilages
Action: Compresses abdomen; retracts ribs and sternum

Question 6

Serratus Dorsalis

Answer 6

Origin: Aponeurosis from medial dorsal line
Insertion: Last ribs
Action: Draws ribs forward

Question 7

Scalenes

Answer 7

Origin: Ribs
Insertion: Transverse process of cervical
Action: Draws ribs forward and bends the neck

Question 8

External Intercostals

Answer 8

Origin: Ribs
Insertion: Ribs
Action: Draws ribs forward

Question 9

Internal Intercostals

Answer 9

Origin: Ribs
Insertion: Ribs
Action: Draws ribs back