1. Muscles
Items to note:
Quiz #2 opens today and is available until Monday 4/23
Markus Hartel · New York street photography
Leonardo Di Vinci

2. 1. Name the 3 layers of connective tissue that wrap
around skeletal muscles.
2. Which one(s) is (are) continuous with a tendon?
3. Botox (botulinum toxin) works by blocking the
release of ACh at the neuromuscular junction.
How does this help with:
crossed eyes
uncontrolled blinking
pesky forehead wrinkles

3. To do today and Wednesday
how muscles work – in general
muscles that move the mandible
abdominal wall muscles
anterior and posterior
inferior and superior
inguinal hernia’s
muscles that move the humerus and scapula
rotator cuff tears, impingement syndrome
muscles that move the femur
sprains, strains and “Charley horse”
muscles that move the foot
shin splints, anterior compartment syndrome
Achilles tendon injuries

5. Extending your knee Extend your knee a few times
How muscles work in general
Extending your knee
Extend your knee a few times
Where are the muscles located that extend your knee?
What is their fiber direction?
Which joint do they cross?
When you extend you knee, where are the antagonist muscles located?

6. Quadriceps = agonists
Hamstrings = antagonists

7. Moving the mandible Depress & elevate Medial & lateral excursion
Mandibular fossa
Depress & elevate
Medial & lateral excursion
Protraction & retraction

8. Muscles that move the mandible
Temporalis
Masseter
attachments
actions

9. Lateral pterygoid
Medial pterygoid
attachments
actions

10. Depress mandible
gravity
digastric muscle
geniohyoid muscle
when hyoid is fixed

11. Those flashy “core” muscles
Overdeveloped
Pectoralis major
External oblique
Rectus abdominus

12. Muscles that move (and protect) the abdomen
Internal oblique
Transversus abdominis
Rectus abdominis
Attachments
Actions
External oblique

13. Linea alba B A C D
Rectus sheath
(aponeurosis)

14. Abdominal wall
abdominal muscles
back muscles
diaphragm
pelvic diaphragm
“holes” in the wall

15. Inguinal canal – men & women
Parietal peritoneum
intestines
scrotum
Spermatic cord

16. Muscle that move the humerus and scapula
Location of shoulder muscles
Which joints do these muscles cross?

17. 3. What is the fiber direction of these muscles?
4. What movements do these muscle perform?

18. Deltoid
attachments
actions

19. attachments
actions

20. attachments actions 4 Rotator cuff muscles supraspinatus infraspinatus
Teres minor
subscapularis
attachments
actions

21. Scapula movers attachments actions Levator scapulae trapezius
rhomboids

23. Impingement syndrome
Rotator cuff tears

25. Muscles that move the femur
1. Location of hip and thigh muscles
2. Which joints do these muscles cross?

26. 3. What is the fiber direction of these muscles?
4. What kind of movements do these muscle perform?

27. iliopsoas
adductors
attachments
actions

28. attachments actions Charley horse Tensor Fasciae Latae (TFL) Rectus
femoris
Vastus lateralis
vastus intermedius
Vastus medialis
Patellar
tendon
attachments
actions
Charley horse

29. attachments actions Tensor Fasciae Latae G. Maximus Iliotibial Band
(IT band)
attachments
actions

30. G. minimus
G. Medius
piriformis
G. Maximus
attachments
actions

31. attachments
actions

32. Anterior
Posterior

34. Attachments of the gastrocnemius Attachments of the soleus
Actions of the gastrocnemius
Flex the knee
Plantarflex the foot
Actions of the soleus
gastrocnemius
Achilles
tendon
Ruptured Achilles tendon
Pulled calf muscle
calcaneus

35. Tibialis Anterior Attachments Actions Dorsiflex ankle Invert foot
Support arch
Shin splints

36. Anterior compartment syndromeTA
Anterior compartment syndrome