Muscles Flashcards
What is the innervation of biceps brachii?
Musculocutaneous nerve
What are the attachments of biceps brachii?
Proximal : short head - tip of coracoid process
long head - supraglenoid tubercle of scapular
Distal : tuberosity of radius and fascia of forearm
What is the action of biceps brachii?
Supinates forearm
Flexes forearm
What is the innervation of caracobrachialis?
Musculocutaneous
What is the action of caracobrachialis?
Flex and adducts the arm
What is the innervation of brachialis?
Musculocutaneous nerve
And partially radial nerve
What is the innervation of triceps brachii?
Radial nerve
What is the action of triceps brachii?
Extends forearm
What is the innervation of anconeus?
Radial nerve
What is the action of anconeus?
Assists triceps in extending forearm
What is the innervation of pronator teres?
Median nerve
What is the action of pronator teres?
Pronator and flexes forearm
What is the innervation of flexor carpi radialis?
Median nerve
What is the action of flexor carpi radialis?
Flexes hand
Radial deviates the wrist
What is the innervation of palmaris longus?
Median nerve
What is the action of palmaris longus?
Flexes hand
What is the innervation of flexor carpi ulnaris?
Ulnar nerve
What is the action of flexor carpi ulnaris?
Flexes hand
Ulnar deviates wrist
What is the innervation of flexor digitorum superficialis?
Median nerve
What is the action of flexor digitorum superficialis?
Flexes the fingers at the middle phalanges
What is the innervation of flexor digitorum profundus?
Medial half - ulnar nerve
Lateral half - median nerve
What is the action of flexor digitorum profundus?
Flexes the fingers at the distal interphalangeal joints
What is the innervation of flexor pollicis longus?
Median nerve
What is the action of flexor pollicis longus?
Flexes thumb
What is the innervation of pronator quadratus?
Median nerve
What is the action of pronator quadratus?
Pronates forearm
Binds radius and ulna together
What is the innervation of brachioradialis?
Radial nerve
What is the action of brachioradialis?
Weak flexion of the forearm
What is the innervation of extensor carpi radialis longus?
Radial
What is the innervation of extensor carpi radialis brevis?
Radial
What is the innervation of extensor digitorum?
Radial
What isa the innervation of extensor digiti minimi?
Radial
What is the innervation of extensor carpi ulnaris?
Radial
What is the innervation of supinator?
Radial nerve
What is the innervation of abductor pollicis longus?
Radial
What is the innervation of extensor pollicis brevis?
Radial
What is the innervation of extensor pollicis longus?
Radial
What is the innervation of extensor indicis?
Radial
What is the innervation of pectoralis major?
Medial and lateral pectoral nerves
What is the action of pectoralis major?
Addiction of arm
Internal rotation of arm
Flexion of arm
What is the innervation of pectoralis minor?
Medial pectoral nerve
What is the action of pectoralis minor?
Pulls scapula medially, anteriorly and inferiorly
What is the innervation of subclavius?
Subclavian nerve
What is the action of subclavius?
Draws clavicle anteriorly and inferiorally
What is the innervation of serrated anterior?
Long thoracic nerve
What is the action of serratus anterior?
Protracts and rotates scapula
What is the innervation of Trapezius?
Accessory nerve
What is the action of trapezius?
Superior part - Elevates scapula
Middle part - Retracts scapula
Inferior part - Depresses scapula
What is the innervation of latissimus dorsi?
Thoraco dorsal nerve
What is the action of latissimus dorsi?
Adducts humerus
Extends arm
Medially rotates humerus
What is the innervation of rhomboids major and minor?
Dorsal scapular nerve
What is the action of rhomboids major and minor?
Retracts scapula
Rotates scapula
What is the action of levator scaupulae?
Elevates scapula
Rotates scapula
What is the innervation of deltoid?
Axillary nerve
What is the action of deltoid?
Anterior fibres - Flexion of arm
Middle fibres - abducts arm
Posterior fibres - extends arm
What is the innervation of teres major?
Subscapular nerve
What is the action of teres major?
Adducts arm
Medially rotates arm
What is the innervation of supraspinatus?
Suprascapular nerve
What is the action of supraspinatus?
Initiation and 0-15 degrees of abduction
What is the innervation of infraspinatus?
Suprascapular nerve
What is the action of infraspinatus?
Lateral rotation of the arm
What is the innervation of teres minor?
Axillary nerve
What is the action of teres minor?
Lateral rotation of the arm
Weak adductor
What is the innervation of subscapularis?
Upper and lower subscapular nerves
What is the action of subscapularis?
Medial rotation of the arm
What is the innervation of flexor pollicis brevis?
Median nerve
What is the innervation of abductor pollicis brevis?
Median nerve
What is the innervation of opponens pollicis?
Median nerve
Name the three hypothenar muscles
Flexor digiti minimi brevis
Abductor digiti minimi
Opponens digiti minimi
What is the innervation the the hypothenar muscles?
Ulnar nerve
What is the innervation of the lumbricals?
Medial lumbricals - ulnar nerve
Lateral lumbricals - median nerve
What is the action of the lumbricals?
Flex at the MCP
Extend the IP joints
What is the innervation of the dorsal interossei muscles?
Ulnar nerve
What is the action of the dorsal interossei?
Abducts the fingers
What is the innervation of palmar interossei?
Ulnar nerve
What is the action of palmar interossei?
Adducts fingers
What is the innervation and action of palmaris brevis?
Ulnar nerve
Wrinkles the skin to improve grip
What is the innervation and action of adductor pollicis?
Ulnar nerve
Adducts thumb
What are the attachments of the flexor retinaculum?
Medially - Pisiform and the hook of hamate
Laterally - scaphoid and trapezium
What is the innervation of pectineus?
Femoral nerve
What is the action of pectineus
Adducts thigh
Flexes thigh
Medially rotates thigh
What is the innervation of Psoas Minor and Major?
Anterior rami of lumbar nerves
What is the action of Psoas Major and Minor?
Flex thigh
What is the innervation of iliacus?
Femoral nerve
What is the action of iliacus?
Flex thigh
What is the innervation of sartorius?
Femoral nerve
What is the innervation of rectus femoris?
Femoral nerve
What is the action of rectus femoris?
Extend the leg at the knee
What is the innervation of vastus lateralis?
Femoral nerve
What is the action of vastus lateralis?
Extend the leg at the knee
What is the innervation of vastus medialis?
Femoral nerve
What is the action of vastus medialis?
Extend the leg at the knee
What is the innervation of vastus intermedius?
Femoral nerve
What is the action of vastus intermedius?
Extend the leg at the knee
What is the innervation of obturator externus?
Obturator
What is the action of obturator externus?
Laterally rotates thigh
What is the innervation of adductor brevis?
Obturator nerve
What is the action of adductor brevis?
Adducts thigh
What is the innervation of adductor longus?
Obturator
What is the action of adductor longus?
Adducts thigh
What is the innervation of gracilis?
Obturator
What is the action of gracilis?
Adducts thigh
Flexes leg
Rotates leg medially
What is the action of adductor magnus?
Adducts thigh
Flexes thigh
Extends thigh
What is the innervation of adductor magnus?
Obturator
Sciatic
What is the innervation of gluteus maximus?
Inferior gluteal nerve
What is the action of gluteus maximus?
Extends thigh
Laterally rotates thigh
Assists with standing from sitting position
What is the innervation of tensor fasciae latae?
Superior gluteal nerve
What is the action of tensor fasciae latae?
Abduct thigh
Medially rotates thigh
Keeps pelvis level when walking
What is the innervation of gluteus medius?
Superior gluteal nerve
What is the action of gluteus medius?
Abduct thigh
Medially rotates thigh
Keeps pelvis level when walking
What is the innervation of gluteus minimus?
Superior gluteal nerve
What is the action of gluteus minimus?
Abduct and medially rotate thigh
Keeps pelvis level when walking
What is the innervation of piriformis?
Branches of S1 and S2
What is the action of piriformis?
Laterally rotate extended thigh
Abduct flexed thigh
What is the innervation of obturator internus?
Nerve to obturator internus
What is the action of obturator internus?
Laterally rotate extended thigh
Abduct flexed thigh
What is the innervation of the superior and inferior gamelli?
Superior - nerve to obturator internus
Inferior - nerve to quadratus femoris
What is the innervation of quadratus femoris?
Nerve to quadratus femoris
What is the action of quadratus femoris?
Laterally rotates thigh
What is the innervation of semitendinosus?
Tibial nerve
What is the action of semitendinosus?
Extend thigh
Flex leg
Rotate leg medially
What is the innervation of semimembranosus?
Tibial nerve
What is the action of semimembranosus?
Extend thigh
Flex leg
Rotate leg medially
What is the innervation of biceps femoris?
Long head - Tibial nerve
Short head - Common fibular nerve
What is the action of biceps femoris?
Flexes leg
Rotates thigh laterally
Extends thigh
What is the innervation of tibialis anterior?
Deep fibular nerve
What is the action of tibialis anterior?
Dorsiflexion of the ankle
Inverts foot
What is the innervation of extensor digitorum longus?
Deep fibular nerve
What is the action of extensor digitorum longus?
Extends digits of the foot
Dorsiflexion of ankle
What is the innervation of extensor hallucis longus?
Deep fibular nerve
What is the action of extensor hallucis longus?
Extends great toe
Dorsiflexion of ankle
What is the innervation of fibularis brevis?
Superficial fibular nerve
What is the action of fibularis brevis?
Everts foot
What is the innervation of fibularis longus?
Superficial fibular nerve
What is the action of fibularis longus?
Everts foot
What is the innervation of gastrocnemius?
Tibial nerve
What is the action of gastrocnemius?
Plantarflexion of ankle
Flexion of knee
What is the innervation of soleus?
Tibial nerve
What is the action of soleus?
Plantarflexion at ankle
What is the innervation of plantaris?
Tibial nerve
What is the action of plantaris?
Assists in plantarflexion of ankle
What is the innervation of popliteus?
Tibial nerve
What is the action of popliteus?
Laterally rotates the femur, unlocking the knee joint allowing it to be flexed
What is the innervation of tibialis posterior?
Tibial nerve
What is the action of tibialis posterior?
Plantarflexion of ankle
Inverts foot
What is the innervation of flexor hallucis longus?
Tibial nerve
What is the action of flexor hallucis longus?
Flexes big toe
Plantarflexion of the ankle
What is the innervation of flexor digitorum longus?
Tibial nerve
What is the action of flexor digitorum longus?
Flexes lateral 4 digits
Plantarflexes ankle