Actual Muscles

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73 Terms

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Occipitofrontalis: (frontal and Occipital)

Origin: Occipital and frontal bones

Insertion: eyebrow, epicranial aponeurosis

Action: Raise eyebrows, tense scalp

<p>Origin: Occipital and frontal bones </p><p>Insertion: eyebrow, epicranial aponeurosis</p><p>Action: Raise eyebrows, tense scalp</p>
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Platysma

Origin: Acromion/ 2nd rib

Insertion: Mandible/cheek

Action: Tense neck, depress mandible, pull lip inferior, think frown

<p>Origin: Acromion/ 2nd rib</p><p>Insertion: Mandible/cheek</p><p>Action: Tense neck, depress mandible, pull lip inferior, think frown</p>
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Orbicularis Oculi

Origin: medial orbit

Insertion: eyelids

Action: close eyes

<p>Origin: medial orbit</p><p>Insertion: eyelids</p><p>Action: close eyes </p>
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Orbicularis Oris

O: maxilla/mandible

I: lips

A; Close lips

<p>O: maxilla/mandible</p><p>I: lips</p><p>A; Close lips</p>
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Temporalis

O: temporal bone

I: Mandible

A: Close Jaw

<p>O: temporal bone</p><p>I: Mandible </p><p>A: Close Jaw </p>
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Masseter

O: zygomatic arch (zygomatic and temporal bone)

I:Mandible

A: Close Jaw

<p>O: zygomatic arch (zygomatic and temporal bone)</p><p>I:Mandible </p><p>A: Close Jaw</p>
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Lateral Pterygoid

O: spehnoid

I: Mandible

A: Open jaw

<p>O: spehnoid</p><p>I: Mandible </p><p>A: Open jaw</p>
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Medial Pterygoid

O: spehnoid

I: Mandible

A: jaw closer

<p>O: spehnoid </p><p>I: Mandible </p><p>A: jaw closer</p>
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Inferior Rectus

O: sphenoid around the optic canal

I: inferior medial surface of eyeball

A; Eye looks inferiorly

<p>O: sphenoid around the optic canal</p><p>I: inferior medial surface of eyeball </p><p>A; Eye looks inferiorly </p>
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Medial Rectus

O: sphenoid around the optic canal

I: medial surface of eyeball

A: eye looks medially

<p>O: sphenoid around the optic canal</p><p>I: medial surface of eyeball </p><p>A: eye looks medially </p>
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Superior rectus

O: sphenoid around the optic canal

I: superior surface of eyeball

A: eye looks superiorly

<p>O: sphenoid around the optic canal</p><p>I: superior surface of eyeball </p><p>A: eye looks superiorly </p>
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Lateral Rectus

O: sphenoid around the optic canal

I: lateral surface of eyeball

A: eye looks laterally

<p>O: sphenoid around the optic canal</p><p>I: lateral surface of eyeball </p><p>A: eye looks laterally </p>
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Inferior Oblique

O: maxillary bone at anterior portion of orbit

I: inferior lateral surface of eyeball

A: eye rolls, looks superiorly and laterally

<p>O: maxillary bone at anterior portion of orbit </p><p>I: inferior lateral surface of eyeball </p><p>A: eye rolls, looks superiorly and laterally </p>
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Superior Oblique

O: spehnoid around optic canal

I: superior lateral surface of eyeball

A: eye rolls, looks inferiorly and latterally

<p>O: spehnoid around optic canal</p><p>I: superior lateral surface of eyeball </p><p>A: eye rolls, looks inferiorly and latterally </p>
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Genioglossus

O: medial surface of mandible around chin

I: body of tounge, hyoid bone

A: depresses and protracts tounge

<p>O: medial surface of mandible around chin</p><p>I: body of tounge, hyoid bone </p><p>A: depresses and protracts tounge </p>
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Sternocleidomastoid

O: one head attaches to sternal end of clavicle, other to manubrium

I: Mastoid region of skull and lateral portion of superior nuchal line or temporal bone

A: flex neck, lateral bend/rotate

<p>O: one head attaches to sternal end of clavicle, other to manubrium </p><p>I: Mastoid region of skull and lateral portion of superior nuchal line or temporal bone </p><p>A: flex neck, lateral bend/rotate </p>
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Erecroe Spinae (Spinalis)

O: iliac crest/ sacrum/ lumbar spinous process

I: spinous process

A: Vertebral extension and lateral flexion

<p>O: iliac crest/ sacrum/ lumbar spinous process</p><p>I: spinous process</p><p>A: Vertebral extension and lateral flexion</p>
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Erector Spinae (longissimus)

O: iliac crest/ sacrum/ lumbar spinous process

I: transverse process

A: A: Vertebral extension and lateral flexion

<p>O: iliac crest/ sacrum/ lumbar spinous process</p><p>I: transverse process</p><p>A: A: Vertebral extension and lateral flexion</p>
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Erector Spinae (iliocostalis)

O: iliac crest/ sacrum/ lumbar spinous process

I: Ribs

A: A: Vertebral extension and lateral flexion

<p>O: iliac crest/ sacrum/ lumbar spinous process</p><p>I: Ribs</p><p>A: A: Vertebral extension and lateral flexion</p>
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Scalenes

O: transverse process

I: Ribs one and two

A: elevate ribs and flex neck

<p>O: transverse process</p><p>I: Ribs one and two </p><p>A: elevate ribs and flex neck</p>
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external intercostal

O: inferior rib

I: superior rib

A: elevate ribs

<p>O: inferior rib </p><p>I: superior rib </p><p>A: elevate ribs </p>
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Internal Intercostal

O: superior rib

I: inferior rib

A: depress ribs

<p>O: superior rib </p><p>I: inferior rib </p><p>A: depress ribs </p>
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External Oblique

O: ribs 5-12

I: iliac crest

A: compress abdomen, depress ribs, flex spine

<p>O: ribs 5-12 </p><p>I: iliac crest</p><p>A: compress abdomen, depress ribs, flex spine</p>
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Internal Oblique

O: iliac crest

I: ribs 5-12, xiphoid process

A: compress abdomen, depress ribs, flex spine

<p>O: iliac crest </p><p>I: ribs 5-12, xiphoid process</p><p>A: compress abdomen, depress ribs, flex spine</p>
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Diaphragm

O: all around: xiphoid process, ribs 4-10, lumbar vertebrae body

I: central tendinous sheet

A: expands thoracic cavity for breathing

<p>O: all around: xiphoid process, ribs 4-10, lumbar vertebrae body</p><p>I: central tendinous sheet</p><p>A: expands thoracic cavity for breathing </p>
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Rectus Abdominis

O: pubic symphysis

I: costal cartilage, xiphoid process

A: compress abdomen, depress ribs, flex spine

<p>O: pubic symphysis</p><p>I: costal cartilage, xiphoid process</p><p>A: compress abdomen, depress ribs, flex spine </p>
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Muscles of the urogenital triangle

-bulbospongiosus

-ischiocavernosus

-superficial transverse perineal

-external sphincter

<p>-bulbospongiosus</p><p>-ischiocavernosus</p><p>-superficial transverse perineal</p><p>-external sphincter</p>
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muscles of the anal triangle

  • -coccygeus

  • -levator ani

    • -iliococcygeus

    • -pubococcygeus


<ul><li><p>-coccygeus</p></li><li><p>-levator ani </p><ul><li><p>-iliococcygeus</p></li><li><p>-pubococcygeus </p></li></ul></li></ul><p></p>
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Trapezius

O: occipital bone, spinous process, thoracic vertebrae

I: acromion and scapular spine

A: position scapula, elevate clavicle, extend neck

<p>O: occipital bone, spinous process, thoracic vertebrae</p><p>I: acromion and scapular spine</p><p>A: position scapula, elevate clavicle, extend neck</p>
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Deltoid

O: acromion and scapular spine

I: humerus

A:

  • Whole deltoid: abduction of shoulder

  • Anterior: flexion/medial rotation of shoulder

  • Posterior: Extension/lateral rotation of shoulder


<p>O: acromion and scapular spine</p><p>I: humerus</p><p>A: </p><ul><li><p>Whole deltoid: abduction of shoulder </p></li><li><p>Anterior: flexion/medial rotation of shoulder</p></li><li><p>Posterior: Extension/lateral rotation of shoulder</p></li></ul><p></p>
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supraspinatus

O: supraspinous fossa

I: greater tubercle of humerus

A: abduct shoulder

<p>O: supraspinous fossa</p><p>I: greater tubercle of humerus </p><p>A: abduct shoulder </p>
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subscapularis

O: subscapular fossa

I: lesser tubercle of humerus

A: medial rotation of shoulder

<p>O: subscapular fossa</p><p>I: lesser tubercle of humerus </p><p>A: medial rotation of shoulder </p>
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infraspinatus

O: infraspinous fossa

I: greater tubercle of humerus

A: lateral shoulder rotation

<p>O: infraspinous fossa </p><p>I: greater tubercle of humerus </p><p>A: lateral shoulder rotation </p>
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Teres Minor

O: scapula

I: greater tubercle of humerus

A: lateral shoulder rotation

<p>O: scapula </p><p>I: greater tubercle of humerus </p><p>A: lateral shoulder rotation </p>
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Pectoralis Major

O: ribs 2-6, body of sternum, clavicle

I: greater tubercle of humerus

A: flexion, adduction, medial rotation of shoulder

<p>O: ribs 2-6, body of sternum, clavicle </p><p>I: greater tubercle of humerus </p><p>A: flexion, adduction, medial rotation of shoulder </p>
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Latissimus dorsi

O: spinous process of vertebrae ribs 8-12

I: Humerus

A: extension, adduction, and medial rotation of shoulder

<p>O: spinous process of vertebrae ribs 8-12</p><p>I: Humerus </p><p>A: extension, adduction, and medial rotation of shoulder</p>
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Biceps brachii

O: coracoid process of scapula

I: radial tuberosity

A: elbow flexion

<p>O: coracoid process of scapula </p><p>I: radial tuberosity</p><p>A: elbow flexion </p>
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Triceps Brachii

O: scapula/humerus

I: ulna olecranon

A: elbow extension

<p>O: scapula/humerus </p><p>I: ulna olecranon</p><p>A: elbow extension</p>
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Pronator quadratus

O: ulna

I: radius

A: pronation

<p>O: ulna </p><p>I: radius </p><p>A: pronation </p>
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Pronator teres

O: coronoid process of ulna

I: radius

A: pronation

<p>O: coronoid process of ulna </p><p>I: radius </p><p>A: pronation </p>
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Supinator

O: humerus and ulna

I: radius

A: supination

<p>O: humerus and ulna </p><p>I: radius </p><p>A: supination</p>
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Flexor Carpi Radialis

O: humerus

I: metacarpals

A: flexion and abduction of wrist

<p>O: humerus </p><p>I: metacarpals </p><p>A: flexion and abduction of wrist </p>
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Flexor carpi ulnaris

O: humerus and ulna

I: metacarpals

A: flexion and adduction of wrist

<p>O: humerus and ulna </p><p>I: metacarpals </p><p>A: flexion and adduction of wrist </p>
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Extensor carpi radialis longus

O: humerus

I: metacarpals

A: extension and abduction of wrist

<p>O: humerus </p><p>I: metacarpals </p><p>A: extension and abduction of wrist </p>
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extensor carpi radialis brevis

O: humerus

I: metacarpals

A; extension and abduction of wrist

<p>O: humerus </p><p>I: metacarpals </p><p>A; extension and abduction of wrist </p>
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Extensor carpi unlaris

O: humerus and ulna

I: metacarpals

A: extension and abduction of wrist

<p>O: humerus and ulna </p><p>I: metacarpals </p><p>A: extension and abduction of wrist </p>
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extensor digitorum

O: humerus

I: phalanges

A: digit extension

<p>O: humerus </p><p>I: phalanges</p><p>A: digit extension</p>
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extensor pollicis brevis

O: radius

I: pollex phalange

A: pollex extension

<p>O: radius </p><p>I: pollex phalange </p><p>A: pollex extension </p>
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extensor pollicis longus

O: unla

I: pollex phalange

A: pollex extension

<p>O: unla </p><p>I: pollex phalange </p><p>A: pollex extension</p>
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Flexor digitorum superficialis

O: humerus, unla, and radius

I: phalanges

A: digit flexion

<p>O: humerus, unla, and radius </p><p>I: phalanges </p><p>A: digit flexion </p>
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Flexor digitorum profunds

O: coronoid process of ulna

I: phalanges

A: digit flexion

<p>O: coronoid process of ulna </p><p>I: phalanges </p><p>A: digit flexion</p>
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Flexor pollicis longus

O: radius

I: pollex phalange

A: pollex flexsion

<p>O: radius</p><p>I: pollex phalange</p><p>A: pollex flexsion </p>
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Actions of intrinsic hand muscles

Digit abduction, adduction, opposition, reposition

<p>Digit abduction, adduction, opposition, reposition </p>
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Gluteus Maximus

O: iliac crest, sacrum and coccyx

I: femur

A: extension and lateral rotation of hip

<p>O: iliac crest, sacrum and coccyx</p><p>I: femur</p><p>A: extension and lateral rotation of hip</p>
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Piriformus

O: sacrum

I: greater trochanter of femur

A: abduction and lateral rotation of hip

<p>O: sacrum </p><p>I: greater trochanter of femur </p><p>A: abduction and lateral rotation of hip</p>
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Adductor Longus

O: Pubis ramus

I: Linea Aspera of femur

A: adduct hip

<p>O: Pubis ramus </p><p>I: Linea Aspera of femur </p><p>A: adduct hip </p>
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Adductor mangus

O: pubis ramus and ischial tuberosity

I: linea aspera of femur

A: adduct hip

<p>O: pubis ramus and ischial tuberosity</p><p>I: linea aspera of femur </p><p>A: adduct hip </p>
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iliopsoas (iliacus)

O: iliac fossa

I: lesser trochanter of femur

A: hip flexion

<p>O: iliac fossa</p><p>I: lesser trochanter of femur </p><p>A: hip flexion</p>
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iliopsoas (psoas major)

O: transverse process of vertebrae

I: lesser trochanter of femur

A: hip flexion

<p>O: transverse process of vertebrae </p><p>I: lesser trochanter of femur </p><p>A: hip flexion </p>
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Biceps femoris

O: ischial tuberosity

I: head of fibula, lateral condyle of of tibia

A: knee flexion

<p>O: ischial tuberosity</p><p>I: head of fibula, lateral condyle of of tibia</p><p>A: knee flexion</p>
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Semimembranosus

O: ischial tuberosity

I: medial condyle of tibia

A: knee flexion

<p>O: ischial tuberosity</p><p>I: medial condyle of tibia</p><p>A: knee flexion</p>
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Semitendinosus

O: ischial tuberosity

I:tibia

A: knee flexion

<p>O: ischial tuberosity</p><p>I:tibia</p><p>A: knee flexion</p>
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Rectus femoris

O: iliac spine and acetabulum

I: tibial tuberosity via patellar ligament

A: knee extension

<p>O: iliac spine and acetabulum</p><p>I: tibial tuberosity via patellar ligament</p><p>A: knee extension </p>
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Vastus intermedius

O: Linea aspera

I: tibial tuberosity via patellar ligament

A: knee extension

<p>O: Linea aspera </p><p>I: tibial tuberosity via patellar ligament</p><p>A: knee extension</p>
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Vastus lateralis

O: greater trochanter and linea aspera

I: tibial tuberosity via patellar ligament

A: knee extension

<p>O: greater trochanter and linea aspera </p><p>I: tibial tuberosity via patellar ligament</p><p>A: knee extension </p>
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Vastus Medialis

O: linea aspera

I: tibial via patellar ligament

A: knee extension

<p>O: linea aspera</p><p>I: tibial via patellar ligament</p><p>A: knee extension</p>
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Tibialis Anterior

O: lateral condyle of tibia

I: medial cuneiform tarsal

A: dorsiflexion/eversion

<p>O: lateral condyle of tibia</p><p>I: medial cuneiform tarsal </p><p>A: dorsiflexion/eversion </p>
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Gastrocnemius

O: femoral condyles

I: calcaneus

A: plantar flexion/eversion

<p>O: femoral condyles </p><p>I: calcaneus </p><p>A: plantar flexion/eversion </p>
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Soleus

O: fibula head and tibia

I: calcaneus

A: plantar flexion

<p>O: fibula head and tibia</p><p>I: calcaneus </p><p>A: plantar flexion</p>
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Flexor digitorum longus

O: tibia

I: inferior phalanges

A: toe flexion

<p>O: tibia</p><p>I: inferior phalanges</p><p>A: toe flexion </p>
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Flexor hallucis longus

O: fibula

I: inferior phalanges

A: toe flexion

<p>O: fibula</p><p>I: inferior phalanges </p><p>A: toe flexion </p>
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extensor digitorum longus

O: tibia and fibula

I: superior phalanges

A; toe extension

<p>O: tibia and fibula</p><p>I: superior phalanges </p><p>A; toe extension </p>
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Extensor hallucis longus

O: Fibula

I: superior phalanges

A: toe extension

<p>O: Fibula </p><p>I: superior phalanges</p><p>A: toe extension </p>