Muscle Names and OIA pt. 1

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Last updated 6:43 PM on 6/20/26
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29 Terms

1
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Orbicularis Oculi

O: Frontal or Maxilla

I: Skin of eyelid

A: Closes/ blinks eye

2
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Zygomaticus

O: zygomatic bone
I: Skin at corner of mouth
A: Smile

3
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Orbicularis oris

O: Maxilla and mandible
I: Skin of mouth
A: Purse lips

4
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Buccinator

O: Maxilla and Mandible
I: Orbicularis Oris
A: Sucks in cheeks (helps with chewing)

5
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Mentalis

O: Mandible
I: Skin of chin
A: Moves chin

6
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Masseter

O: Temporal lobe, zygomatic process, Maxilla

I: Madible
A: Chewing muscle (mastication)

7
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Digastric

O: Mandible

I: Loope on hyoid
A: Open mouth

8
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Sternocleidomastoid

O: Sternum + clavicle

I: Mastoid process
A: Flex head (yes and No head movement)

9
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Temporalis

O: Temporal Bone (N/A)

I: N/A
A: Chewing muscle

10
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Deltoid

O: Clavicle + Scapula

I: Humerus
A: Arm/shoulder abduction

11
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Pectoralis major

O: Sternum + Clavicle

I: Humerus
A: Arm/shoulder flexion

12
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Serratus anterior

O: ribs

I: Scapula
A: Move + hold scapula

13
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External intercostal

O: ribs

I: ribs
A: Breathe in (inspiration)

14
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Internal intercostal

O: Ribs

I: ribs
A: Breathe out (expiration)

15
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Diaphragm

O: ribs + sternum

I: central tendon
A: does 75% of total breathing work

16
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External oblique

O: ribs

I: linea alba or pubis of os coxa
A: Compress abdomen

17
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Internal oblique

O: os coxa

I: linea alba
A: compress abdomen

18
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Rectus abdominus

O: Pubis of os coxa

I: sternum
A: flex spine (bend over)

19
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Transverse abdominus

O: os coxa

I: linea alba
A: compress abdomen

20
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Trapezius

O: Vertebrae (spinous process)

I: spine of scapula
A: move + stabalize scapula

21
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Latissimus dorsi

O: Vertebrae

I: humerus
A: Arm adduction

22
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Rhomboid major

O: Vertebrae
I: Scapula
A: Stabalize scapula

23
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Rhomboid minor

O: Vertebrae
I: scapula
A: stabalize scapula

24
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Levator Scapulae

O: Cervical vertebrae
I: Scapula
A: Elevate scapula

25
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Teres Major

O: Scapula
I: Shaft of humerus
A: arm adduction

26
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Supraspinatus

O: above spine of scapula
I: Head of humerus
A: rotate shoulder + circumduct arm

27
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Infraspinatus

O: Below spine of scapula
I: Head of humerus
A: Rotate shoulder + circumduct arm

28
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Teres Minor

O: scapula
I: head of humerus
A: rotate shoulder + circumduct arm

29
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Subscapularis

O: Scapula
I: Head of humerus
A: Rotate shoulder + circumduct arm