Due Test Day Flashcards Muscle group worksheets (or count your test twice, not recommended)

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

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;

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)

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 )

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)

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)

Coracobrachialis Origin Tip of coracoid process of scapula Insertion Middle third of medial surface of humerus Action Helps to flex and adduct arm Innervation Musculocutaneous nerve (C5, C6 and C7)

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)

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)

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

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

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

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

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

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

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

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

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

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

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

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

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)

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

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

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

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)

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

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)

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

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

Peroneus Tertius Origin fibular shaft surface Insertion Dorsal surface of the base of the fifth metatarsal Action Works with the extensor digitorum longus to dorsiflex and evert Innervation Deep peroneal nerve

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)

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)

Plantaris Origin lateral supracondylar line of distal femur Insertion calcaneal surface, just medial to Achilles tendon Action Plantar flexor of ankle; also flexes knee Innervation Tibial nerve (L5, S1, S2)

Tibialis Posterior Origin Posterior aspect of interosseous membrane, medial fibula, Insertion 2 superficial slip navicular tuberosity deeper slip plantar sufraces of metatarsals 2 - 4 and second cuneiform Action Principal invertor of foot Innervation Tibial nerve (L4, L5)

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)

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)

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

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

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

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

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

Transverse abdominis Origin inner lip of the iliac crest Insertion The muscle ends in front in a broad aponeurosis, Action providing thoracic and pelvic stability Innervation lower intercostal nerves

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

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