ET Practical 2 Primary Movers

Psoas Major - Proximal Attachment

Sides of bodies of T12-L5 and IV discs, TP of lumbar vertebrae

Psoas Major - Distal Attachment

Lesser trochanter of femur

Psoas Major - Innervation

Anterior Rami L1, L2

Psoas Major - Action

Hip Flexion

Rectus Femoris - Proximal Attachment

AIIS and ilium superior to acetabulum

Rectus Femoris - Distal Attachment

Quadriceps tendon; Patella, tibial tubercle via patellar ligament

Rectus Femoris - Innervation

Femoral L3, L4

Rectus Femoris - Action

Hip Flexion, knee extension

Vastus Lateralis - Proximal Attachment

Linea aspera (lateral lip), greater trochanter

Vastus Lateralis - Distal Attachment

Quadriceps tendon; Patella, tibial tubercle via patellar ligament

Vastus Lateralis - Innervation

Femoral L3, L4

Vastus Lateralis - Action

Knee extension

Vastus Medialis - Proximal Attachment

Linea aspera (medial lip), intertrochanteric line

Vastus Medialis - Distal Attachment

Quadriceps tendon; Patella, tibial tubercle via patellar ligament

Vastus Medialis - Innervation

Femoral L3, L4

Vastus Medialis - Action

Knee extension

Vastus Intermedius - Proximal Attachment

Anterior and lateral shaft of femur

Vastus Intermedius - Distal Attachment

Quadriceps tendon; Patella, tibial tubercle via patellar ligament

Vastus Intermedius - Innervation

Femoral L3, L4

Vastus Intermedius - Action

Knee Extension

Tibialis Anterior - Proximal Attachment

Lateral condyle and superior lateral tibia, and interosseous membrane

Tibialis Anterior - Distal Attachment

Medial and inferior surfaces of medial cuneiform and base of 1st metatarsal

Tibialis Anterior - Innervation

Deep fibular L4

Tibialis Anterior - Action

Ankle dorsiflexion, foot inversion

Gastrocnemius Medial head - Proximal Attachment

popliteal surface of femur superior to medial condyle

Gastrocnemius Lateral Head - Proximal Attachment

lateral femoral condyle

Gastrocnemius - Distal Attachment

Calcaneus via calcaneal tendon

Gastrocnemius - Innervation

Tibial S1, S2

Gastrocnemius - Action

Ankle plantarflexion, knee flexion

Soleus - Proximal Attachment

Head and superior surface of posterior fibula, soleal line and medial border of tibia, tendinous arch between bony attachments

Soleus - Distal Attachment

Calcaneus via calcaneal tendon

Soleus - Innervation

Tibial S1, S2

Soleus - Action

Ankle plantarflexion

Anterior Deltoid - Proximal Attachment

Lateral third of clavicle

Anterior Deltoid - Distal Attachment

Deltoid tuberosity of humerus

Anterior Deltoid - Innervation

Axillary C5

Anterior Deltoid - Action

Shoulder Flexion, Humoral Internal Rotation

Middle Deltoid - Proximal Attachment

Acromion

Middle Deltoid - Distal Attachment

Deltoid tuberosity of humerus

Middle Deltoid - Innervation

Axillary C5

Middle Deltoid - Action

Shoulder Abduction

Posterior Deltoid - Proximal Attachment

Spine of scapula

Posterior Deltoid - Distal Attachment

Deltoid tuberosity of humerus

Posterior Deltoid - Innervation

Axillary C5

Posterior Deltoid - Action

Shoulder Extension, Humoral External Rotation

Biceps Brachii Short head - Proximal Attachment

coracoid process

Biceps Brachii Long head - Proximal Attachment

supraglenoid tubercle and superior labrum

Biceps Brachii - Distal Attachment

Radial tuberosity and fascia of the forearm via bicipital aponeurosis

Biceps Brachii - Innervation

Musculocutaneous C6

Biceps Brachii - Action

Forearm Supination, elbow flexion, shoulder flexion

Triceps Brachii Long Head - Proximal Attachment

infraglenoid tubercle

Triceps Brachii Lateral Head - Proximal Attachment

posterior surface of the humerus superior to radial (spiral) groove

Triceps Brachii Medial Head - Proximal Attachment

posterior surface of the humerus inferior to radial (spiral) groove

Triceps Brachii - Distal Attachment

Olecranon process and fascia of forearm

Triceps Brachii - Innervation

Radial C7

Triceps Brachii - Action

Elbow extension

Brachioradialis - Proximal Attachment

Proximal 2/3 of lateral supra-epicondylar ridge of humerus

Brachioradialis - Distal Attachment

Lateral surface of distal end of radius proximal to styloid process

Brachioradialis - Innervation

Radial C6

Brachioradialis - Action

Elbow flexion (maximal in mid-pronated position)

Extensor Carpi Radialis Longus - Proximal Attachment

Lateral supra-epicondylar ridge of humerus

Extensor Carpi Radialis Longus - Distal Attachment

Dorsal aspect of base of 2nd metacarpal

Extensor Carpi Radialis Longus - Innervation

Radial C6, C7

Extensor Carpi Radialis Longus - Action

Wrist extension, radial deviation

Extensor Carpi Radialis Brevis - Proximal Attachment

Lateral epicondyle of humerus

Extensor Carpi Radialis Brevis - Distal Attachment

Dorsal aspect of base of 3rd metacarpal

Extensor Carpi Radialis Brevis - Innervation

Radial (deep branch) C7

Extensor Carpi Radialis Brevis - Action

Wrist extension, radial deviation

Flexor Carpi Radialis - Proximal Attachment

Medial epicondyle

Flexor Carpi Radialis - Distal Attachment

Base of 2nd metacarpal

Flexor Carpi Radialis - Innervation

Median C7

Flexor Carpi Radialis - Action

Wrist flexion, radial deviation

Dorsal Interossei (1-4) - Proximal Attachment

Adjacent sides of 2 metacarpals

Dorsal Interossei (1-4) - Distal Attachment

Base of proximal phalanx and extensor expansions of digits 2-4. 1 & 2: radial side of digits 2 & 3. 3 & 4: ulnar side of digits 3 & 4

Dorsal Interossei (1-4) - Innervation

Ulnar (deep branch) T1

Dorsal Interossei (1-4) - Action

Abduction of digits 2,3,4 from axial line and assists lumbricals with MP flexion, PIP, DIP extension

Flexor Carpi Ulnaris Humeral head - Proximal Attachment

medial epicondyle of humerus

Flexor Carpi Ulnaris Ulnar head - Proximal Attachment

olecranon and posterior border of ulna (via aponeurosis)

Flexor Carpi Ulnaris - Distal Attachment

Pisiform, hook of hamate, 5th metacarpal

Flexor Carpi Ulnaris - Innervation

Ulnar C8

Flexor Carpi Ulnaris - Action

Wrist flexion, ulnar deviation

Extensor Carpi Ulnaris - Proximal Attachment

Lateral epicondyle of humerus, posterior border of the ulna via a shared aponeurosis

Extensor Carpi Ulnaris - Distal Attachment

Dorsal aspect of base of 5th metacarpal

Extensor Carpi Ulnaris - Innervation

Radial (posterior interosseous) C7

Extensor Carpi Ulnaris - Action

Wrist extension, ulnar deviation

Iliacus - Proximal Attachment

Iliac crest, Iliac fossa, ala of sacrum, and anterior sacroiliac ligaments

Iliacus - Distal Attachment

Lesser trochanter of femur (joins psoas major) and shaft inferior to it

Iliacus - Innervation

Femoral L2

Iliacus - Action

Hip Flexion

Gluteus Maximus - Proximal Attachment

Ilium posterior to posterior gluteal line, dorsal surface of sacrum and coccyx, and sacrotuberous ligament

Gluteus Maximus - Distal Attachment

ITB and gluteal tuberosity of femur

Gluteus Maximus - Innervation

Inferior gluteal S1, S2

Gluteus Maximus - Action

Hip extension, Hip External Rotation

Semitendinosus - Proximal Attachment

Ischial tuberosity

Semitendinosus - Distal Attachment

Superior surface of medial tibia (pes anserine)

Semitendinosus - Innervation

Tibial L5, S1

Semitendinosus - Action

Hip extension, knee flexion, tibial internal rotation

Semimembranosus - Proximal Attachment

Ischial tuberosity

Semimembranosus - Distal Attachment

Posterior surface of medial tibial condyle, medial meniscus, oblique popliteal ligament to lateral femoral condyle

Semimembranosus - Innervation

Tibial L5, S1