1. Muscles to Identify
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2. Naming Skeletal Muscles
A. Location of muscle
B. Shape of muscle
C. Relative size
D. Direction of fibers
E. Number of origins
F. Location of attachments
G. Action

3. A. Location of muscle – bone or body region associated with the muscle
Temporalis
Frontalis
Occipitalis

4. B. Shape of muscle
Trapezius
Rhomboid major
Deltoid

5. C. Relative size
Gluteus medius
Gluteus minimus
Gluteus maximus

6. D. Direction of fibers External oblique Rectus abdominis Internal
Transversus
abdominis

7. E. Number of origins
Biceps brachii

8. G. Action

9. Muscles of the Head and Neck

10. Point of Origin= Medial wall of the orbit
Orbicularis Oculi
Point of Origin= Medial wall of the orbit
Point of Insertion= Circular path around the orbit
Action= Closes eyes

11. Point of Origin= Mandible and Maxilla
Orbicularis Oris
Point of Origin= Mandible and Maxilla
Point of Insertion= Corners of the mouth
Action= Closes mouth; purse lips; kissing

12. Point of Origin= Superior temporal fossa
Temporalis
Point of Origin= Superior temporal fossa
Point of Insertion= Coronoid process of the mandible
Action= Closes jaw and elevates the mandible

13. Point of Origin= Manubrium (Sternum) and Clavicle
Sternocleidomastoid
Point of Origin= Manubrium (Sternum) and Clavicle
Point of Insertion= Mastoid process (Temporal bone)
Action= Flexion of neck and rotation of head

14. F. Location of attachments
Sternocleidomastoid

18. Anterior Shoulder and Thorax Muscles

19. Point of Insertion= Lateral lip of intertubercular sulcus
Pectoralis Major
Point of Origin= Medial and anterior clavicle, lateral manubrium, and lateral sternal body
Point of Insertion= Lateral lip of intertubercular sulcus
Action= Adduction and Internal rotation of the shoulder

20. Abdominal Muscles

21. Point of Origin= Ribs 5-12 (at an angle)
External Oblique
Point of Origin= Ribs 5-12 (at an angle)
Point of Insertion= Anterior iliac crest and lateral to the rectus abdominis
Action= Flexion and rotation of vertebral column

23. Point of Origin= Pubic crest and pubic symphysis
Rectus Abdominis
Point of Origin= Pubic crest and pubic symphysis
Point of Insertion= 5th-7th costal cartilages
Action= Flexion of the vertebral column and posterior tilt of the pelvis

24. Posterior Shoulder and Thorax Muscles

25. Point of Origin= Supraspinous fossa
Supraspinatus
Point of Origin= Supraspinous fossa
Point of Insertion= Greater tubercle of the humerus
Action= Abduction of the shoulder

26. Point of Origin= Infraspinous fossa
Infraspinatus
Point of Origin= Infraspinous fossa
Point of Insertion= Greater tubercle of the humerus
Action= External (lateral) rotation of the shoulder

28. Point of Origin= Transverse processes C1-C4
Levator Scapulae
Point of Origin= Transverse processes C1-C4
Point of Insertion= Superior angle of the scapula
Action= elevation of the scapula

29. Point of Insertion= Clavicle, acromion and spine (of the scapula)
Trapezius
Point of Origin= Occipital bone and the spinous processes of C7 through T12
Point of Insertion= Clavicle, acromion and spine (of the scapula)
Action= Elevation and depression of the scapula

30. Posterior Shoulder and Thorax Muscles

31. Point of Insertion= Intertubercular sulcus
Latissimus Dorsi
Point of Origin= Spinous processes of T6-L5, the iliac crest, the sacrum and ribs 9-12.nous
Point of Insertion= Intertubercular sulcus
Action= Adduction of the humerus

32. Point of Origin= Clavicle, acromion and spine of the scapula
Deltoid
Point of Origin= Clavicle, acromion and spine of the scapula
Point of Insertion= Deltoid tuberosity
Action= Abduction of the shoulder

33. Anterior and Posterior Deltoid

34. © 2014 Pearson Education, Inc.
Figure 10.15a–b Muscles crossing the shoulder and elbow joints, causing movements of the arm and forearm, respectively.
Clavicle
Supraspinatus*
Spine of scapula
Deltoid (cut)
Greater tubercle
of humerus
Deltoid
Infraspinatus*
Sternum
Teres minor*
Pectoralis
major
Teres major
Coracobrachialis
Triceps brachii:
Triceps brachii:
Lateral head
Lateral head
Long head
Long head
Medial head
Biceps brachii
Latissimus dorsi
Brachialis
Brachio-
radialis
Humerus
Olecranon
of ulna
Anconeus
Anterior view
Posterior view
© 2014 Pearson Education, Inc. 34

35. Point of Origin= Distal, anterior surface of the humerus
Brachialis
Point of Origin= Distal, anterior surface of the humerus
Point of Insertion= Coronoid process of the ulna
Action=Flexion of the elbow

36. Point of Insertion= Radial tuberosity
Biceps Brachii
Point of Origin=
Long head: superior margin of the glenoid fossa
Short head: the coracoid process of the scapula
Point of Insertion= Radial tuberosity
Action= Flexion of the elbow

37. Point of Insertion= Olecranon
Triceps Brachii
Point of Origin= ong Long head: the inferior margin of the Glenoid fossa
Lateral head: the lateral, posterior surface of the humerus
Medial head: the posterior surface of the humerus
Point of Insertion= Olecranon
Action= Extension of the elbow

38. © 2014 Pearson Education, Inc.
Figure 10.16a Muscles of the anterior fascial compartment of the forearm acting on the right wrist and fingers.
Superficial
transverse
ligament of palm
Palmar
aponeurosis
Flexor
retinaculum
Flexor
digitorum
superficialis
Pronator
quadratus
Flexor pollicis
longus
Flexor carpi
ulnaris
Palmaris
longus
Extensor carpi
radialis longus
Flexor
carpi radialis
Brachio-
radialis
Medial
epicondyle
of humerus
Pronator
teres
Tendon of
biceps brachii
Medial head of
triceps brachii
Biceps brachii
© 2014 Pearson Education, Inc. 38

39. © 2014 Pearson Education, Inc.
Figure 10.17a Muscles of the posterior fascial compartment of the right forearm acting on the wrist and fingers.
Extensor expansion
Tendons of extensor
digitorum
Extensor pollicis
longus
brevis
Abductor
pollicis longus
Extensor digitorum
Extensor carpi
radialis brevis
radialis longus
carpi radialis brevis
and longus
Extensor indicis
Extensor digiti minimi
ulnaris
Flexor carpi ulnaris
Anconeus
Insertion of
triceps brachii
Brachioradialis
© 2014 Pearson Education, Inc.

40. © 2014 Pearson Education, Inc.
Figure 10.20a Anterior and medial muscles promoting movements of the thigh and leg.
12th thoracic
vertebra
12th rib
Quadratus lumborum
Psoas minor
Iliac crest
Psoas major
Iliopsoas
Iliacus
5th lumbar
vertebra
Anterior superior
iliac spine
Tensor fasciae latae
Pectineus
Adductor longus
Sartorius
Gracilis
Quadriceps femoris
• Rectus femoris
Adductor magnus
• Vastus lateralis
• Vastus medialis
Tendon of
quadriceps femoris
Patella
Patellar
ligament
© 2014 Pearson Education, Inc.

41. Figure 10.21a Posterior muscles of the right hip and thigh.
Gluteus medius
Gluteus
maximus
Adductor magnus
Gracilis
Iliotibial tract
Long head
Biceps
femoris
Short head
Hamstrings
Semitendinosus
Semimembranosus
© 2014 Pearson Education, Inc.

42. Figure 10.22a Muscles of the anterior compartment of the right leg.
Fibularis longus
Tibia
Gastrocnemius
Tibialis anterior
Extensor digitorum longus
Soleus
Extensor hallucis longus
Fibularis tertius
Superior and inferior
extensor retinacula
Extensor hallucis brevis
Extensor digitorum
brevis
© 2014 Pearson Education, Inc.

43. Figure 10.24a Muscles of the posterior compartment of the right leg.
Plantaris
Medial head
Gastrocnemius
Lateral head
Tendon of
gastrocnemius
Calcaneal
tendon
Medial
malleolus
Lateral malleolus
Calcaneus
Superficial view of the posterior leg.
© 2014 Pearson Education, Inc.

44. Figure 10.24b Muscles of the posterior compartment of the right leg.
Lateral
head (cut)
Plantaris
Gastrocnemius
Popliteus
Medial
head (cut)
Head of
fibula
Soleus
Tendon of
plantaris
Fibularis
longus
Fibularis
brevis
Tendon of
tibialis
posterior
The gastrocnemius has been
removed to show the soleus
immediately deep to it.
© 2014 Pearson Education, Inc.

45. Point of Insertion= Tibial tuberosity
Rectus Femoris
Point of Origin= AIIS
Point of Insertion= Tibial tuberosity
Action= Extension of the knee joint

46. Point of Origin= Greater trochanter
Vastus Lateralis
Point of Origin= Greater trochanter
Point of Insertion= Tibial tuberosity
Action= Extension of the knee joint

47. Point of Origin= Intertrochanteric line
Vastus Medialis
Point of Origin= Intertrochanteric line
Point of Insertion= Tibial tuberosity
Action= Extension of the knee joint

48. Point of Origin= Inferior pubic ramus
Gracilis
Point of Origin= Inferior pubic ramus
Point of Insertion= Medial condyle of the tibia
Action= Adduction of the hip and flexion of the knee

49. Point of Insertion= Medial and anterior tibia
Sartorius
Point of Origin= ASIS
Point of Insertion= Medial and anterior tibia
Action= Hip flexion and medial rotation of the knee

50. Point of Origin= Lateral surface of the ilium
Gluteus Medius
Point of Origin= Lateral surface of the ilium
Point of Insertion= Greater trochanter
Action= Abduction of the hip

51. Point of Origin= lateral surface of the ilium
Gluteus Maximus
Point of Origin= lateral surface of the ilium
Point of Insertion=Gluteal tuberosity and iliotibial (IT) band
Action=Extension and abduction of thigh at the hip

52. Point of Origin= Lateral condyle of the tibia
Tibialis Anterior
Point of Origin= Lateral condyle of the tibia
Point of Insertion= Medial cuneiform and 1st metatarsal
Action= Dorsiflexion and inversion of the foot

53. Point of Origin= Medial and lateral condyles of the femur
Gastrocnemius
Point of Origin= Medial and lateral condyles of the femur
Point of Insertion= Posterior calcaneus
Action= Plantar flexion