Labs 16, 17, 18

Cat Muscle Dissection and Identification (use pictures and video provided)

NOTE: All deep muscles will be dissected on the right side of the body only. Superficial muscles will remain intact on the left side of the body. Identify the following muscles:

Abdomen
external oblique
internal oblique
transverse abdominis
rectus abdominis
Chest & Neck
xiphihumeralis
pectoralis major
pectoralis minor
pectoantebrachialis
serratus ventralis (anterior)
rectus abdominis
scalenius medius
rectus thoracis (transverse costarum)
subscapularis
Back
clavotrapezius
clavobrachialis (clavodeltoid)
acromiotrapezius
spinotrapezius
levator scapula
acromiodeltoid
spinodeltoid
rhomboideus
supraspinatus
teres major
teres minor
infraspinatus
latissimus dorsi / Upper Arm
epitrochlearis
biceps brachii
triceps brachii (long head)
triceps brachii (medial head)
triceps brachii ((lateral head)
brachialis
Upper Leg
biceps femoris
semitendinosus
semimembranous
adductor femoris
adductor longus
vastus lateralis
vastus medialis
rectus femoris
sartorius
gracillis
tensor fascia latae
pectineus
Lower Leg
gastrocnemius
soleus
peroneus muscles
tibialis anterior
extensor digitorum longus
Hip
gluteus maximus
gluteus medius
caudofemoralis
Related Structures
linea alba
calcaneal (Achilles’s) tendon
sciatic nerve

Human & Cat Muscle Differences

1. pectoralis major- larger in human, smaller in cat

2. pectoralis minor- smaller in human, larger in cat

3. pectoantebrachialis – not present in human

4. Xiphihumeralis – not present in human

5. clavotrapezius, acromiotrapezius, spinotrapezius – three muscles in cat, one muscle in human (trapezius).

6. caudofemoralis – not present in human

7. gluteus maximus – larger than gluteus medius in humans, smaller than gluteus medius in cat.

8. sartorius – wide muscle in cat, narrow muscle in human

9. adductor femoris – one muscle in cat, three muscles (adductor longus, adductor brevis, adductor magnus) in human

10. epitrochlearis – not present in human