Cat Dissection: Day 4:
Feb. 2
Lab Agenda:
I.
II.
III.
IV.
Prepare lab station for dissection: pan, tools, paper towels, lab manual. Remember to wear
your gloves, goggles, and face mask (if desired).
Bring your cat specimen to you lab station, untie bag, and place on dissection pan. Save the
body bag, rubber band, and toe tag to be reused at the end of class.
Open the skin of the cat. Finish any remaining dissections from previous lab days:
a. Jaw/mandible/throat muscles
b. Abdominal muscles – superficial AND deep
c. Shoulder/upper arm muscles
d. Forearm muscles
e. Leg muscles – all
Locate the muscles listed below on your cat specimen. Attempt to locate the origin and
insertion of each muscle by teasing the muscle. Do not cut through the muscles. Then,
determine the action that each of these muscles performs and fill in the last box of this
table. You may find this web link helpful:
http://www.saddleback.edu/faculty/charrison/smmuscles.html
Muscle
Origin
Insertion
1.
spinotrapezius,
acromiotrapezius, and
clavotrapezius (trapezius)
Occipital bone, spines of
C7 and all T vertebrae
spine and acromion of
scapula
2.
latissimus dorsi
lower vertebrae, iliac
crest
intertubercular groove
of humerus
3.
serratus anterior
upper 8 ribs
anterior aspect of
medial border of
scapula
4.
rhomboideus
spinous process of C1-T5 medial border of
scapula
5.
pectoralis major
clavicle, sternum, costal
cartilages
greater tubercle of
humerus
6.
pectoralis minor
ribs 3,4,5
coracoid process of
scapula
7.
acromiodeltoideus,
spinodeltoideus and
clavodeltoideus (deltoids)
clavicle, acromion and
scapular spine
deltoid tuberosity of
humerus
8.
supraspinatus
supraspinous fossa of
scapula
greater tubercle of the
humerus
Action
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Cat Dissection: Day 4:
Feb. 2
9.
infraspinatus
infraspinous fossa
greater tubercle of the
humerus
10. triceps brachii
axillary border of
scapula, posterior
humerus
olecranon process of
the ulna
11. biceps brachii
coracoid process,
radial tuberosity
intertubercular groove of
the humerus
12. brachialis
distal anterior humerus
coronoid process of
ulna
13. flexor carpi ulnaris
medial epicondyle of
humerus, olecranon
process
base of 5th metacarpal,
pisiform and hamate
14. palmaris longus
medial epicondyle of
humerus
palmar aponeurosis
15. flexor carpi radialis
medial epicondyle of
humerus
base of 2nd and 3d
metacarpals
16. pronator teres
medial epicondyle of
humerus
lateral radius
17. brachioradialis
distal humerus
18. extensor carpi radialis
lateral epicondyle of
humerus
metacarpals II and III
19. extensor digitorum communis
lateral epicondyle of the
humerus
posterior surfaces of
distal phalanges of
digits 2-5
20. extensor digitorum minimi
--
--
21. extensor carpi ulnaris
lateral epicondyle of
humerus
metacarpal V
22. masseter
zygomatic arch
angle and ramus of
mandible
23. mylohyoideus
mandible
Hyoid
24. digastricus
mandible and mastoid
process
hyoid bone
25. sternohyoideus
manubrium and clavicle
hyoid bone
26. sternomastoideus
manubrium, clavicle
mastoid process
27. external oblique
lower 8 ribs
iliac crest and linea alba
28. internal oblique
lumbodorsal fascia
lower 4 ribs
styloid process of
radius
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Cat Dissection: Day 4:
Feb. 2
29. transverse abdominis
iliac crest, cartilages of
lowest ribs
linea alba and pubic
crest
30. rectus abdominis
pubic crest and pubic
symphysis
ribs 5-7 and xiphoid
process
31. tensor fascia latae
iliac crest and anterior
superior iliac spine
iliotibial tract
32. gluteus medius
ilium
greater trochanter of the
femur
33. gluteus maximus
ilium, sacrum, coccyx
iliotibial tract, gluteal
tuberosity of femur
34. sartorius
anterior superior iliac
spine
tibia
35. gracilis
pubis
medial tibia
37. biceps femoris
ischial tuberosity and
femur
tibia and fibula
38. semitendinosus
ischial tuberosity
medial aspect of
proximal tibia
39. semimembranosus
ischial tuberosity
medial condyle of tibia
40. vastus lateralis
linea aspera
patella and tibial
tuberosity
41. vastus medialis
linea aspera
patella and tibial
tuberosity
43. rectus femoris
anterior inferior iliac
spine
patella and tibial
tuberosity
44. gastrocnemius
medial and lateral
condyles of femur
via achilles tendon onto
calcaneal tendon
45. tibialis anterior
lateral condyle and tibial
shaft
first cuneiform and first
metatarsals
46. soleus
head of fibula and tibia
calcaneal tendon onto
calcaneus
47. fibularis longus
head of fibula
first metatarsal
48. extensor digitorum longus
posterior tibia
distal phalanges of toes
2-5
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Cat Dissection: Day 4:
Feb. 2
V.
Cat Dissection/Muscular System target:
a. I can locate and name the superficial muscles of the abdomen and thoracic cavity:
i. Clavodeltoid
ii. Pectoantebrachialis
iii. Pectoralis major
iv. Pectoralis minor
v. Xiphimumeralis
vi. Latissimus dorsi
vii. External oblique
viii. Linea alba
b. I can locate and name the deep muscles of the abdomen and thoracic cavity:
i. Internal oblique
ii. Transverse abdominis
iii. Rectus abdominus
iv. Scalenes
v. Serratus ventralis
vi. Subscapularis*
c. I can locate and name the muscles of the jaw and neck:
i. Mandible
ii. Digastric muscles
iii. Masseter
iv. Sternohyoid
v. Sternomastoid
vi. Clavotrapezius
d. I can locate and name the muscles of the shoulder and deep neck:
i. Clavotrapezius
ii. Clavodeltoid
iii. Acromiotrapezius
iv. Spinodeltoid
v. Spinotrapezius
vi. Rhomboids
vii. Supraspinatus
e. I can locate and name the muscles of the arm:
i. Triceps brachii
ii. Brachioradialis
iii. Extensor/Flexor carpi radialis
iv. Extensor/Flexor carpi ulnaris
v. Biceps brachii
vi. Palmaris longus
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Cat Dissection: Day 4:
Feb. 2
f.
VI.
VII.
VIII.
I can locate and name the muscles of the hind limb/leg:
i. Sartorius
ii. Gluteus medius
iii. Tensor fasciae latae
iv. Gluteus maximus
v. Biceps femoris
vi. Semitendinosus
vii. Gastrocnemius
viii. Soleus
ix. Extensor digitorum longus
x. Fibularis longus
xi. Calcaneal tendon
Practice learning the musculature of the cat by visiting these web links:
a. http://www.mhhe.com/biosci/ap/cat_dissect/cat_demo/muscular_system/Suppectoral
2/suppectoralindex.html
b. http://biology.kenyon.edu/heithausp/cat-tutorial/welcome.htm
c. http://www.saddleback.edu/faculty/charrison/smmuscles.html
d. http://homes.bio.psu.edu/people/faculty/strauss/anatomy/musc/muscular.htm
Upcoming cat muscle test: _______________________________________________
Practice, practice, practice! Come in to chat with your cat, i.e. locate the muscles on your
willing specimen, often! Study Hall, Advisory, and before or after school are ready openings
for you to study the cat muscles.
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