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Anatomy and Physiology I > Muscles: Identifying them, their origins, insertions and actions > Flashcards

Muscles: Identifying them, their origins, insertions and actions Flashcards

1
Q

What is the location of the occipitofrontalis frontal belly muscle?

A

The forehead

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2
Q

What is the location of the orbicularis oculi muscle?

A

Encircles the eye

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3
Q

What are the locations of the zygomaticus major and minor?

A
  • The zygomaticus major is found more laterally, extending diagonally downwards from the zygomatic bone towards the mouth
  • The zygomaticus minor is found more medial to the z. major, extending diagonally from the zygomatic bone towards the mouth
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4
Q

What is the location of the levator labii superioris?

A
  • This muscle can be found in the cheek medial to the zygomaticus minor and laterally to the nose
  • Extends straight up and down from the ocbicularis oculi muscle towards the orbicularis oris
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5
Q

What is the location of the depressor labii inferioris?

A

-The chin, laterally to the mentalis muscles, extending downwards diagnally from the orbicularis oris towards the sides of the chin

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6
Q

What is the location of the mentalis muscle?

A

-The most medial muscles of the chin, extend inwards diagnally to form a v

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7
Q

What is the location of the sternocleomastoid muscle?

A

-The neck, extend inwards to form a v from the temporal bone down to the sternal end of the clavicles

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8
Q

What is the location of the inferior rectus muscle?

A

-Directly underneath the eyeball

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9
Q

What is the location of the superior rectus muscle?

A

-Directly above the eyeball

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10
Q

What is the location of the medial rectus muscle?

A

-Directly medial of the eyeball

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11
Q

What is the location of the lateral rectus muscle?

A

-Directly lateral of the eyeball

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12
Q

What is the location of the superior oblique muscle?

A

-Superior to the eyeball, extending from lateral portion of the eyeball just under the superior rectus to medial part of eye socket, then towards the back of the eye socket

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13
Q

What is the location of the inferior oblique muscle?

A

-Extends from just under the lateral rectus, medial and inferiorly towards the medial side of the eye socket

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14
Q

What is the location of the orbicularis oris?

A

-Encircles the mouth

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15
Q

What is the action of the occipitofrontalis frontal belly muscle?

A

-Raises eyebrows, wrinkles forehead

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16
Q

What is the action of the orbicularis oculi muscle?

A

-Closes eye

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17
Q

What is the action of the levator labii superioris muscle?

A

-To elevate/lift the upper lip

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18
Q

What is the action of the depressor labbi inferioris muscle?

A

-To depress/lower the lower lip

19
Q

What is the action of the orbicularis oris muscle?

A

-To purse/compress the lips

20
Q

What is the action of the mentalis muscle?

A

-Causes lower lip to protrude/pout

21
Q

What is the action of the sternocleomastoid muscle?

A
  • Allows bilateral flexion of the neck
  • Allows unilateral/lateral flexion of the neck
  • Turning of neck
22
Q

What is the action of the inferior rectus muscle?

A

-Looking down

23
Q

What is the action of the superior rectus muscle?

A

-Looking up

24
Q

What is the action of the medial rectus muscle?

A

-Looking medially

25
Q

What is the action of the lateral rectus muscle?

A

-Looking laterally

26
Q

What is the action of the superior oblique muscle?

A

-Eye rolling, looks down

27
Q

What is the action of the inferior oblique muscle?

A

-Eye rolling, looks up

28
Q

What is the action of the zygomaticus major muscle?

A

-Elevates corner of mouth, draws it laterally

29
Q

What is the action of the zygomaticus minor?

A

-Elevates upper lip

30
Q

What are the origin and insertion points of the occipitofrontalis frontal belly muscle?

A
  • Origin: Epicranial aponeurosis

- Insertion: Skin of eyebrow + bridge of nose

31
Q

What are the origin and insertion points of the orbicularis oculi muscle?

A
  • Origin: Meidal margin of orbit

- Insertion: Skin around eyelids

32
Q

What are the origin and insertion points of the levator labii superioris muscle?

A
  • Origin: Inferior margin of orbit

- Insertion: Orbicularis oris

33
Q

What are the origin and insertion points of the depressor labii inferioris muscle?

A
  • Origin: Maxilla and mandible

- Insertion: Skin of lower lip

34
Q

What are the origin and insertion points of the mentalis muscle?

A
  • Origin: Mandible

- Insertion: Skin of chin

35
Q

What are the origin and insertion points of the sternocleomastoid muscle?

A
  • Origin: Clavicle and sternum

- Insertion: Mastoid process of temporal bone

36
Q

What are the origin and insertion points of the inferior rectus?

A
  • Origin: Sphenoid

- Insertion: Inferior surface

37
Q

What are the origin and insertion points of the superior rectus muscle?

A
  • Origin: Sphenoid

- Insertion: Superior surface

38
Q

What are the origin and insertion points of the lateral rectus muscle?

A
  • Origin: Sphenoid

- Insertion: Lateral surface

39
Q

What are the origin and insertion points of the medial rectus muscle?

A
  • Origin: Sphenoid

- Insertion: Medial surface

40
Q

What are the origin and insertion points of the inferior oblique muscle?

A
  • Origin: Maxilla

- Insertion: Inferior/lateral surface

41
Q

What are the origin and insertion points of the superior oblique muscle?

A
  • Origin: Sphenoid

- Insertion: Superior/lateral surface

42
Q

What are the origin and insertion points of the zygomaticus major muscle?

A
  • Origin: Zygomatic bone

- Insertion: Muscles at angle of mouth

43
Q

What are the origin and insertion points of the zygomaticus minor muscle?

A
  • Origin: Zygomatic bone

- Insertion: Upper lip

Anatomy and Physiology I (3 decks)

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