Muscle Anatomy for Final Exam Part 1

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57 Terms

1
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Orbicularis oculi

closes eyelids

<p>closes eyelids</p>
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Levator nasolabialis

lifts upper lip and nostril

<p>lifts upper lip and nostril</p>
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Zygomaticus

draws the commissure of lips caudally

<p>draws the commissure of lips caudally</p>
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Buccinator

compresses cheeks, aids chewing

<p>compresses cheeks, aids chewing</p>
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Orbicularis oris

closes lips

<p>closes lips</p>
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Platysma

draws lips caudally (towards the tail); superficial cutaneous muscle

<p>draws lips caudally (towards the tail); superficial cutaneous muscle</p>
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Temporalis

elevates the mandible (largest in carnivores)

<p>elevates the mandible (largest in carnivores)</p>
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Masseter

closes jaw, lateral chewing force

<p>closes jaw, lateral chewing force</p>
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Pterygoid (medial & lateral)

side-to-side grinding movement

<p>side-to-side grinding movement</p>
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Digastricus

opens jaw (dual innervation: CN V and VII)

<p>opens jaw (dual innervation: CN V and VII)</p>
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Dorsal, ventral, medial, lateral rectus

move eye in corresponding direction

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Dorsal & ventral oblique

rotate the globe

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Retractor bulbi

retracts the eyeball into the orbit

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Genioglossus

protrudes tongue

<p>protrudes tongue</p>
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Hyoglossus

retracts and depresses tongue

<p>retracts and depresses tongue</p>
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Styloglossus

elevates and retracts tongue

<p>elevates and retracts tongue</p>
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Intrinsic muscles

alter tongue shape

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Brachiocephalicus

advances limb, extends shoulder and head, turns head sideward

<p>advances limb, extends shoulder and head, turns head sideward</p>
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Sternocephalicus

draws head and neck to the side

<p>draws head and neck to the side</p>
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Sternohyoideus / Sternothyroideus

draw hyoid/larynx caudally

<p>draw hyoid/larynx caudally</p>
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Longus colli

ventral to cervical vertebrae; flexes neck

<p>ventral to cervical vertebrae; flexes neck</p>
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Scalenus

originates from ribs; assists respiration, flexes neck

<p>originates from ribs; assists respiration, flexes neck</p>
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Splenius

dorsal to longus capitis; extends/raises the head

<p>dorsal to longus capitis; extends/raises the head</p>
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Semispinalis capitis

extends the head and neck

<p>extends the head and neck</p>
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Longissimus capitis et atlantis

extends and rotates head

<p>extends and rotates head</p>
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Trapezius

elevates and abducts the limb

<p>elevates and abducts the limb</p>
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Rhomboideus

elevates the limb

<p>elevates the limb</p>
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Serratus ventralis

supports trunk, depresses scapula

<p>supports trunk, depresses scapula</p>
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Latissimus dorsi

draws limb caudally, flexes shoulder

<p>draws limb caudally, flexes shoulder</p>
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Omotransversarius

advances limb

<p>advances limb</p>
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Superficial pectorals

adducts the limb

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Deep pectorals

supports trunk, adducts and draws limb caudally

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Supraspinatus

extends shoulder

<p>extends shoulder</p>
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Infraspinatus

stabilizes and abducts shoulder

<p>stabilizes and abducts shoulder</p>
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Subscapularis

adducts limb

<p>adducts limb</p>
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Deltoideus

flexes shoulder

<p>flexes shoulder</p>
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Teres major/minor

flex shoulder

<p>flex shoulder </p>
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Biceps brachii

flexes elbow, extends shoulder

<p>flexes elbow, extends shoulder</p>
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Triceps brachii

extends elbow, long head flexes shoulder

<p>extends elbow, long head flexes shoulder</p>
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Brachialis

flexes elbow

<p>flexes elbow</p>
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Tensor fasciae antebrachii

extends elbow

<p>extends elbow</p>
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Extensor carpi radialis

extends carpus

<p>extends carpus</p>
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Common digital extensor

extends digits and carpus

<p>extends digits and carpus</p>
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Lateral digital extensor

extends digits

<p>extends digits</p>
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Ulnaris lateralis

flexes carpus

<p>flexes carpus</p>
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Flexor carpi radialis

flexes carpus

<p>flexes carpus</p>
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Flexor carpi ulnaris

flexes carpus

<p>flexes carpus</p>
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Superficial digital flexor

flexes carpus and digits

<p>flexes carpus and digits</p>
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Deep digital flexor

flexes digits and carpus

<p>flexes digits and carpus</p>
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Pronator teres & quadratus

pronate forearm (minor role)

<p>pronate forearm (minor role)</p>
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Supinator

supinates forearm

<p>supinates forearm</p>
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External intercostals

inspiration

<p>inspiration</p>
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Internal intercostals

expiration

<p>expiration</p>
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Serratus dorsalis cranialis

lifts ribs during inspiration

<p>lifts ribs during inspiration</p>
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Serratus dorsalis caudalis

draws last ribs caudally during expiration

<p>draws last ribs caudally during expiration</p>
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Rectus Thoracis

assists with inspiration (originates from first rib to costal cartilages)

<p>assists with inspiration (originates from first rib to costal cartilages)</p>
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Transversus Thoracis

aids in expiration; lies on internal surface of sternum