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MUSCLES OF THE BODY. You need to be able to know the location and action of these muscles!!!. Occipitalis. Wrinkle forehead, elevate eyebrow. Frontalis. Wrinkle forehead, elevate eyebrow. Orbicularis Oculi. Blinks eye. Orbicularis Oris. Closes Lips. Buccinator. Compresses cheek.

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muscles of the body

MUSCLES OF THE BODY

You need to be able to know the location and action of these muscles!!!

occipitalis

Occipitalis

Wrinkle forehead, elevate eyebrow

frontalis

Frontalis

Wrinkle forehead, elevate eyebrow

orbicularis oris

Orbicularis Oris

Closes Lips

buccinator

Buccinator

Compresses cheek

zygomaticus

Zygomaticus

Helps to smile

(lift corners of lips)

platysma

Platysma

Helps to frown

(lower corners of lips)

temporalis

Temporalis

Close jaw

masseter

Masseter

Close jaw

sternocleidomastoid

Sternocleidomastoid

Flex neck and rotate head

trapezius

Trapezius

Extends head, rotates and adducts scapula

latissimus dorsi

Latissimus Dorsi

Extend, adduct & rotate arm medially

deltoid

Deltoid

Abducts & flexes arm

pectoralis major

Pectoralis Major

Flexes, adducts & rotates arm medially

rotator cuff

Rotator Cuff

Group of 4 muscles that rotates & stabilizes arm

Supraspinatus, Infraspinatus, Subscapularis, Teres Minor

erector spinae

Erector Spinae

Rotates and extends vertebral column and head

external intercostals

External Intercostals

Elevate ribs (inspiration)

internal intercostals

Internal Intercostals

Depress ribs (forced expiration)

diaphragm

Diaphragm

Inspiration

rectus abdominis

Rectus Abdominis

Flexes & compresses abdomen

external oblique

External Oblique

Compresses abdomen

internal oblique

Internal Oblique

Compresses abdomen

transversus abdominis

Transversus Abdominis

Compresses abdomen

biceps brachii

Biceps Brachii

Flexes elbow joint (forearm)

triceps brachii

Triceps Brachii

Extend elbow joint (forearm)

brachialis

Brachialis

Flexes elbow joint (forearm)

brachioradialis

Brachioradialis

Flexes elbow joint (forearm)

forearm muscles
Forearm Muscles
  • Flexor carpi ulnaris – flexes wrist
  • Flexor carpi radialis – flexes wrist
forearm muscles1
Forearm Muscles
  • Extensor carpi radialis - extends wrist
forearm muscles2
Forearm Muscles
  • Extensor carpi ulnaris - extends wrist
forearm muscles3
Forearm Muscles
  • Flexor digitorum - flexes fingers
forearm muscles4
Forearm Muscles
  • Extensor digitorum - extends fingers
gluteus maximus

Gluteus Maximus

Extends & rotates thigh laterally

gluteus medius

Gluteus Medius

Abducts & rotates thigh

rectus femoris

Rectus Femoris

Flexes Thigh, Extends Lower Leg

(part of quadriceps)

vastus lateralis

Vastus Lateralis

Extends Lower Leg

(part of quadriceps)

vastus medialis

Vastus Medialis

Extends Lower Leg

(part of quadriceps)

slide50
The 4th muscle of the “quad” group is the Vastus Intermedius, which is hidden below the other three!
slide51
1. vastus medialis

2. vastus lateralis

3. vastus intermedius

4. rectus femoris

sartorius

Sartorius

Flexes & laterally rotates thigh

(longest muscle of the body!)

adductor muscles

Adductor Muscles

Adducts thigh

Gracilis, Adductor Magnus, Adductor Longus, Adductor Brevis

biceps femoris

Biceps Femoris

Flex knee and extend hip

(part of hamstring group)

semimembranosus

Semimembranosus

Flex knee and extend hip

(part of hamstring group)

semitendinosus

Semitendinosus

Flex knee and extend hip

(part of hamstring group)

tibialis anterior

Tibialis Anterior

Dorsiflexes and inverts foot

gastrocnemius

Gastrocnemius

Plantar flexes foot & flex lower leg

(calf muscle)

soleus

Soleus

Plantar flexes foot

fibularis longus

Fibularis Longus

Plantar flexes & everts foot

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