Origin, Insertion, Action
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| platysma | fascia of chest | mandible, corner of mouth | tenses neck, pull down lower lip
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| scalenes | transverse process of cervical vertebrae | first two ribs | elevate first two ribs (inspiration), flex and rotate neck
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| trapezius | occipital bone, vertebrae | clavicle, scapula | rotate scapula
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| latissimus dorsi | spines of vertebrae, iliac crest | humerus | extend, rotate arm
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| pectoralis major | clavicle, sternum | humerus | flex, adduct humerus
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| serratus anterior | upper ribs | scapula | pull scapula anterior and down
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| deltoid | scapula, clavicle | deltoid tuberosity on humerus | adduct, extend, flex arm
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| triceps brachii | scapula, humerus | olecranon process of ulna | extend forearm
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| biceps brachii | scapula | radial tuberosity of radius | flex forearm
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| brachioradialis | distal lateral humerus | radius | flex forearm at elbow
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| flexors | anterior forearm | flex hand and wrist
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| extensors | posterior forearm | extend hand and wrist
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| external oblique | lower ribs | iliac crest | compress abdomen, flex laterally
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| rectus abdominus | pubic symphysis | xiphoid process of sternum | compress, flex trunk
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| internal oblique | iliac crest | lower ribs | compress abdomen, flex laterally
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| sartorius | anterior superior iliac crest (ASIS) | medial tibia | flex, adduct, rotate thigh
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| gracilis | pubic symphysis | tibia | adduct thigh
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| soleus | fibula, posterior tibia | calcaneus | plantar flexion
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| gastrocnemius | condyles of femur | calcaneus | plantar flexion
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| tibialis anterior | lateral condyle of tibia | tarsals | dorsiflexion, inversion of foot
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| gluteus maximus | sacrum coccyx, ilium | femur | major extensor of thigh
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| adductor brevis | pubis | posterior femur | adduct and rotate thigh
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| adductor magnus | pubis | posterior femur | adduct and rotate thigh
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| adductor longus | pubis | posterior femur | adduct and rotate thigh
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| zygomaticus major/minor | zygomatic bone | corner of mouth | "smile"; raises corners of mouth
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| masseter | zygomatic arch and bone | angle and ramus of mandible | prime mover of jaw closure
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| sternocleidomastoid | sternum, clavicle | temporal, occipital bone | rotate head
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| orbicularis oculi | frontal bone, maxilla | eyelid | closes eye
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| temporalis | temporal fossa | coronoid process of mandible | close jaw
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| rhomboids | neck/spine | scapula | stabilize scapula
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| teres major | posterior scapula | humerus | rotate humerus laterally
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| brachialis | front of distal humerus | coronoid process of ulna | major forearm flexor
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| supraspinatous | supraspinous fossa of scapula | greater tubercle of humerus | initiates abduction, stabilize shoulder
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| infraspinatous | infraspinous fossa of scapula | greater tubercle of humerus | rotates humerus laterally
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| iliopsoas | sacrum, lower spine | lesser trochanter of femur | flex thigh, or flex trunk on thigh
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| pectineus | pubis | lesser trochanter of femur | adduct, flex, medially rotate thigh
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| tensor fasciae latae | iliac crest/iliac spine | iliotibial tract | steadies knee
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| biceps femoris | ischial tuberosity, distal femur | head of fibula, lateral condyle of tibia | extends thigh and flexes knee
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| semimembranosus | ischial tuberosity | medial condyle of tibia | extend thigh and flex knee
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| semitendinosus | ischial tuberosity | medial upper tibia | extend thigh and flex knee
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| vastus intermedius | anterior lateral shaft of femur | patella/patellar ligament | extend knee
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| vastus medialis | linea aspera | patellar ligament | extend knee
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| vastus lateralis | greater trochanter/linea aspera | patellar ligament | extend and stabilize knee
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| rectus femoris | anterior inferior iliac spine/acetabulum | patellar ligament | extend knee, flex thigh at hip
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| fibularis longus | head, upper portion of fibula | via long tendon to metatarsal | plantar flexion and eversion of foot
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| erector spinae | ribs | cervical vertebrae | prime mover of back extension
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| digastric | mandible, mastoid process of temporal bone | hyoid bone via connective tissue | open mouth
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| orbicularis oris | maxilla, mandible | encircle mouth | close lips
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Created by:
pearljen
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