MYOLOGY: Head & Neck Muscles

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1
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Identify and state the innervation of (A):

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A) Medial Pterygoid Muscle

B) Trigeminal Nerve (CNV)

2
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State TWO actions of (A):

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Protrusion and Elevation of the Mandible

3
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What is the origin & insertion of (A)?

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A) Origin: Medial aspect of Lateral Pterygoid plate, Sphenoid Bone

B) Insertion: medial ramus of mandible

4
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What are the unilateral actions of A?

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Contralateral deviations

5
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Identify and state the innervation of (C):

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A) Lateral Pterygoid Muscle

B) Trigeminal Nerve (CNV)

6
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What is the origin AND insertion of (C)?

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A) Origin: Lateral aspect of Lateral Pterygoid plate, Sphenoid Bone

B) Insertion: neck of mandible & TMJ capsule & disc

7
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State two actions of C?

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A) protrude mandible

B) protrude intra‐articular disc

8
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What are the unilateral actions of C?

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Contralateral deviation

9
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Identify and state TWO actions of (A)?

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A) Temporalis Muscle

B) Elevation & Retraction of the Mandible

10
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What is the origin and insertion of (A)?

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A) Temporal fossa of the skull

B) Coronoid Process of Mandible

11
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What are the unilateral actions of A?

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Ipsilateral deviation

12
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What muscle attaches to (C)?

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Temporalis Muscle

13
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What muscle attaches to (D)?

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Medial Pterygoid Muscle

14
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Identify and state the function of (A):

A) Buccinator – muscle

B) To compress the cheeks

15
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Identify and state the innervation of (C):

A) Buccinator – muscle

B) Facial Nerve

16
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State the origin AND insertion of (B):

Origin: Zygomatic Arch

Insertion: Lateral Ramus & Angle of the Mandible

17
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State 2 actions and the innervation of A?

A) elevates & protrude Mandible

B) Mandibular Nerve (Trigeminal)

18
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Identify and state the function and innervation of (B)?

A) Orbicularis Occuli – muscle

B) To close the eyelids

C) Facial Nerve

19
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Identify and state the origin & insertion of (A):

A) Sternocleidomastoid – muscle

B) Manubrium & mediale clavicle

C) Mastoid Process & superior nuchal line – insertion

20
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What is the shape AND fibre arrangement of (A)?

A) Strap – Shape

B) Parallel – Fibre Arrangement

21
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Identify (C) and state what emotional expression it executes?

A) Frontalis (Frontal Belly of Occipitofrontalis)

B) Surprise

22
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State TWO actions and the innervation of C?

A) moves scalp & elevates eyebrows

B) facial nerve

23

What innervates the muscles of facial expression?

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Facial Nerve (CNVII)

24
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Identify A, state the action?

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A) Levator Palpebrae Superioris

B) Elevates superior eyelid (opening the upper eyelid)

25
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'What 'muscle of facial expression is NOT innervated by the Facial Nerve (CNVII)? State the innervation?

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A) Levator Palpebrae Superioris

B) Oculomotor Nerve (CNIII)

26
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Identify (C)?

What is the innervation of (C)?

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A) Levator Palpebrae Superioris

B) Oculomotor Nerve (CNIII)

27
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State which muscles are innervated by the Oculomotor Nerve (CNIII)?

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A) Extrinsic muscles of the eye: Superior, Inferior, Medial Rectus, Inferior Oblique

B) Facial Expression Muscle: Levator Palpebrae Superioris

28
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Identify (A)?

State the action & innervation?

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A) Lateral Rectus

B) Abduct Eye & Abducens Nerve

29
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What do the extrinsic muscles of the eye: superior, inferior, medial and lateral rectus have in common?

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The origin: Common Tendinous Ring

30

What is the insertion & action of the Medial & Lateral Rectus of the eye?

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Medial: Anterior Medial Insertion, Adduct Eye

Lateral Anterior Lateral Insertion, Abduct Eye

31

What is the insertion & action of the Superior & Inferior Rectus of the eye?

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Superior: Anterior Superior Eyeball, elevation in abduction

Inferior: Anterior Inferior, depression in abduction

32

State origin, insertion, action & innervation of Superior Oblique?

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  1. Origin: Sphenoid in Orbit
  2. Insertion: Posterior Superior Eyeball
  3. Action: Depression in Adduction
  4. Innervated: Trochlea Nerve
33

State origin, insertion, action & innervation of Inferior Oblique?

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  1. Origin: Orbital portion of Maxilla
  2. Insertion: Posterior Inferior Eyeball
  3. Action: Elevation in Adduction
  4. Innervated: Oculomotor Nerve
34

What intrinsic eye muscles are active when eyeball is looking downward medially?

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A) Right Eye: Inferior Rectus / Superior Oblique

B) Left Eye: Superior Oblique / Inferior Rectus

35
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Identify (A) and state the origin AND insertions?

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(A): Sternocleidomastoid

(B): ORIGIN: Manubrium & Medial Clavicle

(C): INSERTION: Mastoid Process & Superior Nuchal Line

36

State the innervation and actions of SCM?

(A): Accessory Nerve

(B): BILATERAL: UPPER & LOWER CERVICAL EXTENSION

(C): UNILATERAL: IPSILATERAL LATERAL FLEXION & CONTRALATERAL ROTATION

37
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Identify the SUPRAHYOID (A) (B) (C) Muscles & state the collective unilateral action?

(A) GENIOHYOID (B) DIGASTRIC (C) MYLOHYOID

(D) ELEVATE HYOID & LARYNX OR DEPRESS MANDIBLE; if mandible fixed = elevate hyoid (swallowing), if hyoid fixed = depress mandible (mastication)

38
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Identify this group of muscles & state the Unilateral action?

(A): Infrahyoid

(B): DEPRESS HYOID & MOVE THE LARYNX