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head and neck Finals > Muscles Of The Neck > Flashcards

Muscles Of The Neck Flashcards

1
Q

Superior attachment of the platysma muscle

A

inferior border of mandible and tissues of lower face

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2
Q

Inferior attachment of the platysma muscle

A

fascia covering pectoralis major and deltoid muscles

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3
Q

Platysma nerve supply

A

cervical branch of facial nerve

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4
Q

Action of platysma muscle

A

1- tenses skin as in shaving the neck or easing a tight collar
2- depresses mandible and corners of mouth as in expression of sadness or fright

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5
Q

A paired muscle in the superficial layers of the anterior portion of the neck; passes obliquely across the side of the neck; thick and narrow at its central part, but broader and thinner at either end

A

SCM

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6
Q

Origin of SCM

A

Anterior and superior manubrium and superior medial third of clavicle

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7
Q

Insertion of SCM

A

Lateral aspect of mastoid process and anterior half of superior nuchal line

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8
Q

SCM nerve supply

A

Spinal accessory nerve (lateral roots C1-5)

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9
Q

SCM action:

A

1- flexes and laterally rotates cervical spine
2- protracts head when acting together
3- extends neck when neck already partially extended

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10
Q

Anterior neck muscles / strap muscles

A
  1. Suprahyoid muscles

2. Infrahyoid muscles

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11
Q

region above (superior) the hyoid bone in the neck

A

Suprahyoid

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12
Q

Suprahyoid muscles

A
  • digastric
  • stylohyoid
  • geniohyoid
  • mylohyoid
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13
Q

Infrahyoid muscles

A
  • sternothyroid
  • sternohyoid
  • thyrohyoid
  • omohyoid
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14
Q

A group of four pairs of muscles in the anterior part of the neck above the hyoid bone

A

Suprahyoid muscles

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15
Q

O: mastoid process mandible
I: intermediate tendon (hyoid bone)
N: anterior belly - mandibular division (V3);
posterior belly - facial nerve (CN VII)

A

Digastric

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16
Q

O: styloid process
I: greater cornu of hyoid bone
N: facial nerve

A

Stylohyoid

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17
Q

O: symphysis menti
I: hyoid bone
N: C1 via hypoglossal nerve

A

Geniohyoid

18
Q

O: mylohyoid line of mandible
I: median raphe
N: mylohyoid nerve from mandibular nerve

A

Mylohyoid

19
Q
  1. elevate the hyoid when mandible is fixed

2. opens the jaw when the hyoid is fixed

A

Digastric

20
Q

elevate the hyoid during swallowing

A

Stylohyoid

21
Q

carry hyoid bone and the tongue upward during deglutition

A

Geniohyoid

22
Q

raises oral cavity floor, elevates hyoid, depresses mandible

A

Mylohyoid

23
Q

it has two bellies; connected by a tendon, which attaches to the body of the hyoid bone.

A

Digastric

24
Q

a slender muscle, lying in front of, and above the posterior belly of the digastric muscle.
It is perforated, near its insertion, by the tendon of the Digastric muscle

A

Stylohyoid

25
Q

a narrow muscle situated superior to the medial border of the mylohyoid muscle

A

Geniohyoid

26
Q

It forms, with its fellow of the opposite side, a muscular floor for the cavity of the mouth

A

Geniohyoid

27
Q

flat and triangular, and is situated immediately above the anterior belly of the digastric muscle; forms a muscular floor for the cavity of the mouth

A

Mylohyoid

28
Q

A group of four pairs of muscles in the anterior part of the neck below the hyoid bone.

A

Infrahyoid muscles

29
Q

O: sternum
I: thyroid cartilage
N: ansa cervicalis from the cervical plexus(C1-3)

A

Sternothyroid

30
Q

O: sternum
I: hyoid bone
N: ansa cervicalis from the cervical plexus(C1-3)

A

Sternohyoid

31
Q

O: thyroid cartilage
I: hyoid bone
N: C1

A

Thyrohyoid

32
Q

O: superior border of scapula
I: hyoid bone
N: ansa cervicalis from the cervical plexus(C1-3)

A

Omohyoid

33
Q

a thin, narrow muscle attaching the hyoid bone to the sternum

A

Sternohyoid

34
Q

shorter and wider than the Sternohyoid, beneath which it is situated

A

Sternothyroid

35
Q

a small, quadrilateral muscle appearing like an upward continuation of the Sternothyroid

A

Thyrohyoid

36
Q

a muscle at the front of the neck that consists of two bellies separated by an intermediate tendon

A

Omohyoid

37
Q

The inferior belly of the Omohyoid divides the posterior triangle of the neck into

A

upper or occipital triangle

lower or subclavian triangle

38
Q

The superior belly of the omohyoid divides the anterior triangle into

A

upper or carotid triangle

lower or muscular triangle

39
Q

Infrahyoid muscle action

A

depress the hyoid bone and larynx during swallowing and speaking

40
Q

Broad thin subcutaneous sheet of muscle, superficial to the external jugular vein (EJV) and the main cutaneous nerves of the neck

A

Platysma

head and neck Finals (15 decks)

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