1. Test next class
Due
Flashcards (not optional)
Muscle group worksheets
Muscle Diagrams (today)
(or count your test twice)

2. Pectoralis Minor Origin 3rd to 5th ribs
Insertion coracoid process of scapula
Action Stabilizes scapula and protracts
Innervation Medial pectoral nerves;

3. Pectoralis Major Origin
Clavicular head: anterior surface of medial half of clavicle Sternocostal head: anterior surface of sternum, superior six costal cartilages
Insertion intertubercular groove of humerus
Action Horizontally Adducts and internally rotates humerus;

4. Deltoid
Origin Lateral third of clavicle, acromion, and spine of scapula
Insertion Deltoid tuberosity of humerus
Action
Anterior part: flexes Middle part: abducts arm Posterior part: extends
Innervation Axillary nerve (C5 and C6)

5. Biceps Brachii
Origin
Short head: tip of coracoid process of scapula Long head: supraglenoid tubercle of scapula
Insertion Tuberosity of radius and fascia of forearm via bicipital aponeurosis
Action Supinates forearm and, when it is supine, flexes forearm
Innervation Musculocutaneous nerve (C5 and C6 )

6. Brachialis Origin Distal half of anterior surface of humerus
Insertion Coronoid process and tuberosity of ulna
Action Major flexor of forearm -- flexes forearm in all positions primarily pronated
Innervation Musculocutaneous nerve (C5 and C6)

7. Brachioradialis
Origin Proximal 2/3 of lateral supracondyle ridge of humerus
Insertion Lateral surface of distal end of radius
Action Flexes forearm in a neutral position
Innervation Radial nerve (C5, C6 and C7)

8. Trapezius Origin base of the occitpital bone & Spine
Insertion Lateral third of clavicle, acromion, and spine of scapula
Action superior fibers elevate, middle fibers retract, and inferior fibers depress scapula;
Innervation Spinal root of accessory nerve (CN XI) (motor) and cervical nerves (C3 and C4) (pain and proprioception)

9. Rhomboid Major and Minor
Origin
Minor: spinous processes of C7 and T1 vertebrae Major: spinous processes of T2 - T5 vertebrae
Insertion Medial border of scapula from level of spine to inferior angle
Action Retract scapula Innervation Dorsal scapular nerve ( C4 and C5)

10. Latissimus Dorsi
Origin Spinous processes T7-T12 thoracolumbar fascia, iliac crest
Insertion intertubercular groove of humerus
Action adducts, and Internaly rotates humerus;
Innervation Thoracodorsal nerve

11. Triceps Brachii Origin
Long head: infraglenoid tubercle of scapula Lateral head: posterior surface of humerus, Medial head: posterior surface of humerus,
Insertion Olecranon process of ulna
Action
Chief extensor of elbow
Long Head extends the Shoulder

12. Adductor Brevis Origin inferior pubic ramus,
Insertion medial lip of linea aspera of the Femur
Action Adducts the thigh,
Innervation obturator nerve

13. Gracilis Origin pubic symphysis, inferior ramus of pubis,
Insertion Pes Anserine tendon with sartorious and semitendinosus (Tibia)
Action adducts the thigh, Flexes the knee,
Innervation Anterior division of obturator nerve

14. Pectineus Origin Pubic bone Insertion Pectineal line of femur
Action Adducts the thigh and flexes the hip joint
Innervation Femoral nerve

15. Adductor Longus Origin Pubic Bone Insertion linea aspera of the femur,
Action Adducts the thigh,
Innervation Anterior division of obturator nerve

16. Adductor Magnus Origin Ishial Tuberosity
Insertion linea aspera, medial supracondylar ridge, and adductor tubercle
Action Powerful thigh adductor
Innervation Posterior division of obturator nerve innervates

17. Vastus Medialis Origin medial lip of linea aspera of femur
Insertion Medial base of quadriceps tendon
Action Extends the knee
Innervation femoral nerve

18. Vastus Intermedius
Origin Superior 2/3 of anterior and lateral surfaces of femur
Insertion Lateral border of patella
Action Extends the knee
Innervation femoral nerve

19. Vastus Lateralis Origin greater trochanter, of femur
Insertion Lateral base and border of patella;
Action Extends the knee
Innervation femoral nerve

20. Rectus Femoris Origin anterior inferior iliac spine
Insertion Base of patella to form the quadriceps femoris tendon
Action Extends the knee & flexes the hip
Innervation femoral nerve

21. Iliopsoas Origin (2) Psoas Major L1 - L5 Iliacus iliac fossa of ilium
Insertion Lesser trochanter
Action Flex the hip
Innervation Psoas from direct fibers of L1 - L3 of lumbar plexus; Iliacus femoral nerve

22. Gluteus Maximus Origin Posterior ilium, sacrum and coccyx
Insertion iliotibial band; also into the gluteal tuberosity of the femur
Action Major extensor of hip joint
Innervation Inferior gluteal nerve (L5, S1, S2)

23. Gluteus Medius Origin exterior iliac crest
Insertion greater trochanter
Action Major abductor of thigh
Innervation Superior gluteal nerve (L4, L5, S1)

24. Gluteus Minimus Origin Dorsal ilium Insertion greater trochanter
Action Abducts
Innervation Superior gluteal nerve (L4, L5, S1)

25. Tensor Fascia Lata Origin Anterior superior iliac spine
Insertion Iliotibial band
Action Abducts Innervation Superior gluteal nerve (L4, L5, S1)

26. Extensor Hallucis Longus
Origin Anterior surface of the fibula Insertion distal phalanx of great toe
Action Extends great toe and dorsiflexes ankle
Innervation Deep peroneal nerve (L4, L5, S1)

27. Extensor Digitorum Longus
Origin Lateral condyle of fibula,
Insertion middle and distal phalanges 2-5
Action Extend toes and dorsiflexes ankle
Innervation Deep peroneal nerve (L4, L5, S1)

28. Tibialis Anterior Origin Lateral condyle of tibia,
Insertion 1st cuneiform and on base of first metatarsal
Action Dorsiflexor of ankle
Innervation Deep peroneal nerve (L4, L5, S1)

29. Peroneus Brevis Origin lateral fibular surface;
Insertion Base of 5th metatarsal base
Action Everts foot and weak plantar flexor
Innervation Superficial peroneal nerve

30. Peroneus Longus Origin Head of fibula,
Insertion medial cuneiform and lateral side of 1st metatarsal base
Action Everts foot and weak plantar flexor
Innervation Superficial peroneal nerve

31. Gastrocnemius Origin Medial head medial femoral condyle;
Lateral head lateral femoral condyle
Insertion the Achilles tendon, inserting on calcaneus
Action Powerful plantar flexor of ankle
InnervationTibial nerve (S1, S2)

32. Soleus
Origin Posterior fibular head & Tibia, Insertion Achilles tendon, inserting on the calcaneal surface
Action Powerful plantar flexor of ankle
Innervation Tibial nerve (S1, S2)

33. Tibialis Posterior
Origin Posterior aspect of interosseous membrane, medial fibula,
Insertion 2
superficial slip navicular tuberosity
deeper slip plantar sufraces of metatarsals and second cuneiform
Action Principal invertor of foot
Innervation Tibial nerve (L4, L5)

34. Flexor Hallucis Longus
Origin Inferior 2/3 of posterior surface of fibula, lower part of interosseous membrane
Insertion Plantar surface of base of distal phalanx of great toe
Action Flexes great toe, inverts the ankle
Innervation Tibial nerve (S2, S3) (S2, S3)

35. Flexor Digitorum Longus
Origin Posterior surface of tibia distal to popliteal line
Insertion bases of 2nd - 5th distal phalanges
Action Flexes toes 2 - 5; also helps in plantar flexion of ankle
Innervation Tibial nerve (S2, S3) (S2, S3)

36. Semitendinosus Origin ischial tuberosity
Insertion tibia (pes anserine tendon)
Action Extends the hip and flexes the knee
Innervation Tibial nerve

37. Semimembranosus Origin ischial tuberosity Insertion medial tibial
Action Extends the hip, flexes the knee
Innervation Tibial nerve

38. Biceps Femoris Origins (2) Long head ischial tuberosity;
short head linea aspera of femur
Insertion Fibular head
Action Flexes the knee and the long head also extends the hip joint
Innervation Long head by tibial nerve; short head by common peroneal nerve

39. Sartorius Origin Anterior superior iliac spine
Insertion tibia, with Gracillis and Semitendinosus
Action Flexes and laterally rotates the hip joint and flexes the knee (Hackey Sack)
Innervation Femoral nerve

40. Rectus Abdominis Origin Pubis Crest
Insertion Ribs (5th, 6th, & 7th) Xipoid Process
Action Spine (Lumbar) Flexion
Innervation thoraco-abdominal nerves

41. Internal oblique
Origin: Inguinal ligament, Iliac crest Insertion: Linea alba, Xiphoid process and the inferior ribs.
Nerve: lower intercostal nerves
Action: rotates the torso on the same side

42. External oblique Origin: Lower 8 Ribs
Insertion Iliac crest, Inguinal Ligament
Nerve: lower 6 intercostal nerve + subcostal nerve
Action: Rotates torso on the opposite side