Major muscles and their function
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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| orbicularis oris | compresses purses lips/draws lip together (kiss)ENCIRCLES THE MOUTH
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| orbicularis oculi | closes eyelid/ PROTECTS FROM INTENSE LIGHT. BLINKING, SQUINTING. MUSCLES OF THE EYELIDSthe area of blackeye is the muscle
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| frontalis | raises eyebrow/ move scalp forward & backward
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| zygomaticus | minor:retracts and elevates upper lip, major: retracts and elevates corners of mouth...SMILE MUSCLE
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| occipitalis (epicranious- occipitofrontalis) | tenses and retracts scalp
raises the eyebrow ( as if in surprise
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| sternocleidomastoid | together: flex neck, alone: bends head toward shoulder turns face to opp. side
O-MANIBRIUM AND CLAVICLE (MEDIAL PORTION)
I- SUPERIOR NACHAL LINE OF OCCIPITAL BONE
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| rectus abdominis | depresses ribs, flexes vertebral column
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| transverse abdominis | compresses abdominal contents
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| Temporalis | Elevates mandible, AND SIDE TO SIDE MOVEMENT
I-CORONOID PROCESS OF MANDIBLE VIA LIGAMENT
0-TEMPRORAL FOSSA
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| serratus anterior | protracts shoulder, rotates scapula so glenoid cavity moves superiorly
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| pectoralis major | flexion, adduction, medial rotation at shoulder
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| latissimus dorsi | extension, adduction and medial rotation at shoulder
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| deltoid | whole: abduction at shoulder, anterior: flexion and medial rotation, posterior: extension and lateral rotation
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| mentalis | elevates and protrudes lower lip
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| triceps brachii | extension at elbow, long head: extension and adduction at shoulder
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| biceps brachii | flexion at elbow and shoulder, supination at elbow
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| brachialis | flexion at elbow
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| supinator | supination
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| diaphragm | contraction expands thoracic cavity compreses abdominopelvic cavity
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| internal intercostals | elevate ribs
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| external intercostals | depresses ribs
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| Buccinator | compresses cheeks/ use when whistling, sucking,blow bubbles. Holds food between teeth when chewing
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| platysma | draws mouth downward/pull skin over clevicle up
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| splenius capitis | together: extend neck, each rotates and laterally flexes neck to that side
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| semispinalis capitis | together: extend head each extends and laterally flexes neck
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| iliocostalic cervicis | extends or laterally flexes neck, elevates ribs
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| iliocostalis thoracis | stabilizes thoracec vertebrae in extension
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| iliocostalis lumborum | extends vertebral column and depresses ribs
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| longissimus capitus | together: extends neck, each rotates and laterally flexes neck to that side
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| longissimus cervicis | together: extends neck, each rotates and laterally flexes neck to that side
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| masseter TEMPORALIS *PRIME MOVERS OF THE MANDIBLE | closes jaw, chewing,ELEVATION
MAINTAINS POSITION OF JAW @REST, ELEVATES
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| longissimus thoracis | extends vertebral column, each produces lateral flextion to that side
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| spinalis cervicis | extends neck
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| sternocleidomastoid | together: flex neck, alone: bends head toward shoulder turns face to opp side
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| pectoralis minor | depresses and protracts shoulder, rotates scapula so glenoid cavity moves inferiorly.
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| brachioradialis | flexion at elbow
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| internal oblique | tenses abdominal wall and compresses abdominal contents
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| trapezius | extends head, raises, rotates and retracts scapula and stabilizes it.
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| external oblique | compresses abs, depresses ribs, flexes/bends spine
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| rhomboids | Adducts scapula and downward rotation
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| teres minor | lateral rotation @ shoulder
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| teres major | extension, adduction and medial rotation at shoulder
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| infraspinatus | lateral rotation at shoulder
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| supraspinatus | abduction at shoulder
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| subscapularis | medial rotation at shoulder
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| pronator teres | pronation
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| supinator | supination
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| risorius | draws corners of mouth to side/make fish face
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| depressor anguli oris | depresses lower lip
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| Zygomaticus Major | draws mouth upward / smile muscle
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| Depressor labii inferioris | allow lips to pull downward / frown muscle
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| Medial Pterygoid | assist mandible in chewing
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| Longus Colli | bend neck forward
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| Longu Capitis | flexs-rotate the head
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| Scalenus Anterior SUPERIOR AND POSTERIOR | ELEVATES FIRST 2 RIBS (AIDS RESPIRATION) FLEXES AND ROTATES NECK
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| Scalenus Medias | rasies the 1st rib
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| Scalenus Posterior | bend cervical vertebrae, raises 2nd rib
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| Nasalis | helps open and close nasal
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| Corrugator Supercilii | move eyebrow up and down
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| SPLENIS ( BAND-AID ) | BEARS MOST OF RESPONSIBILITY IN EXTENSION AND HYPER-EXTENSION OF THE NECK, UNILATERALLY ROTATES, LATERALLY FLEXION SAME SIDE
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Created by:
romaniam
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