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Anatomy > Anterior Triangle of the Neck > Flashcards

Anterior Triangle of the Neck Flashcards

1
Q

What are the muscles of the Anterior Triangle of the Neck?

A

Digastric, Mylohyoid, Hyoglossal, Sternothyroid, Omohyoid, Sternohyoid, Thyrohyoid, Stylohyoid, Geniohyoid

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2
Q

What is the origin of the Digastric muscle?

A

posterior belly: mastoid process

anterior belly: digastric fossa, internal mandible

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3
Q

What is the insertion of the Digastric muscle?

A

lateral aspect of body of hyoid

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4
Q

What is the nerve supply of the Digastric muscle?

A

posterior belly: CN VII

anterior bell: Mylohyoid nerve (s) mandibular nerve (m)

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5
Q

What is the blood supply of the Digastric muscle?

A

anterior belly: submental artery

posterior belly: occipital artery

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6
Q

What is the action of the Digastric muscle?

A

open mouth by depressing mandible, fixes hyoid bone

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7
Q

What is noteworthy about the Digastric muscle?

A

derivative of second pharyngeal arch

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8
Q

What is the origin of the Mylohyoid muscle?

A

inner surface of mandible

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9
Q

What is the insertion of the Mylohyoid muscle?

A

body of hyoid

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10
Q

What is the nerve supply of the Mylohyoid muscle?

A

sensory: mylohyoid nerve
motor: mandibular nerve (CN V)

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11
Q

What is the blood supply of the Mylohyoid muscle?

A

mylohyoid branch of inferior alveolar artery

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12
Q

What is the action of the Mylohyoid muscle?

A

elevates hyoid bone, raises floor of mouth, depresses mandible when hyoid is fixed

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13
Q

What is noteworthy about the Mylohyoid muscle?

A

derivative of second pharyngeal arch

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14
Q

What is the origin of the Hyoglossal muscle?

A

upper border of the greater horn of they hyoid and body of the hyoid bone

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15
Q

What is the insertion of the Hyoglossal muscle?

A

spreads out into the intrinsic muscles of the tongue

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16
Q

What is the nerve supply of the Hyoglossal muscle?

A

CN XII (hypoglossal nerve)

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17
Q

What is the blood supply of the Hyoglossal muscle?

A

lingual artery

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18
Q

What is the action of the Hyoglossal muscle?

A

depresses the sides of the tongue, retracts the tongue

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19
Q

What is noteworthy about the Hyoglossal muscle?

A

extrinsic muscle of the tongue

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20
Q

What is the origin of the Sternothyroid muscle?

A

posterior manubrium

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21
Q

what is the insertion of the Sternothyroid muscle?

A

thyroid cartilage

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22
Q

What is the nerve supply of the Sternothyroid muscle?

A

C2 and C3 by a branch of ansa cervicalis

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23
Q

What is the blood supply of the Sternothyroid muscle?

A

superior thyroid artery

24
Q

What is the action of the Sternothyroid muscle?

A

depresses hyoid and larynx

25
Q

What is the origin of the Omohyoid muscle?

A

superior belly: hyoid bone

inferior belly: superior scapular border

26
Q

What is the insertion of the Omohyoid muscle?

A

superior belly: hyoid bone

inferior belly: clavicle via intermediate tendon

27
Q

What is the nerve supply of the Omohyoid muscle?

A

C1-C3 by a branch of ansa cervicalis

28
Q

What is the blood supply of the Omohyoid muscle?

A

transverse cervical artery

29
Q

What is the action of the Omohyoid muscle?

A

depresses hyoid and larynx

30
Q

What is noteworthy about the Omohyoid muscle?

A

intermediate tendon is tethered to the clavicle by a fascial sling

31
Q

What is the origin of the Sternohyoid muscle?

A

sternum

32
Q

What is the insertion of the Sternohyoid muscle?

A

body of hyoid

33
Q

What is the nerve supply of the Sternohyoid muscle?

A

C1-C3 by a branch of ansa cervicalis

34
Q

What is the blood supply of the Sternohyoid muscle?

A

superior thyroid artery

35
Q

What is the action of the Sternohyoid muscle?

A

depresses hyoid and larynx

36
Q

What is the origin of the Thyrohyoid muscle?

A

thyroid cartilage

37
Q

What is the insertion of the Thyrohyoid muscle?

A

body of hyoid

38
Q

What is the nerve supply of the Thyrohyoid muscle?

A

ansa cervicalis (C1)

39
Q

What is the blood supply of the Thyrohyoid muscle?

A

superior thyroid artery

40
Q

What is the action of the Thyrohyoid muscle?

A

depresses hyoid

41
Q

What is noteworthy about the Thyrohyoid muscle?

A

lies deep to Sternohyoid

42
Q

What is the origin of the Stylohyoid muscle?

A

styloid process

43
Q

What is the insertion of the Stylohyoid muscle?

A

lateral margin of the hyoid

44
Q

What is the nerve supply of the Stylohyoid muscle?

A

stylohyoid branch of CN VII (facial nerve)

45
Q

What is the blood supply of the Stylohyoid muscle?

A

ascending pharyngeal artery

46
Q

What is the action of the Stylohyoid muscle?

A

pulls hyoid superiorly and posteriorly during swallowing

47
Q

What is the origin of the Geniohyoid muscle?

A

inner surface of the mandible

48
Q

What is the insertion of the Geniohyoid muscle?

A

body of hyoid

49
Q

What is the nerve supply of the Geniohyoid muscle?

A

ansa cervicalis (C1) via hypoglossal nerve (CN XII)

50
Q

What is the blood supply of the Geniohyoid muscle?

A

lingual and submental arteries

51
Q

What is the action of the Geniohyoid muscle?

A

elevates tongue, depresses mandible, works with mylohyoid

52
Q

What are the boundaries of the Anterior Cervical Triangle?

A

anterior midline of neck, inferior border of mandible, anterior border of SCM. Can be divided into four small triangles.

53
Q

What are the boundaries of the Submandibular Triangle?

A

mandible, posterior and anterior bellies of digastric muscle. Contains the submandibular gland, ganglion, lymph nodes, CN XII, and facial vein and artery

54
Q

What are the boundaries of the Submental Triangle?

A

hyoid bone, anterior bellies of digastric muscle. Contains the beginning of the anterior jugular veins and lymph nodes.

55
Q

What are the boundaries of the Carotid Triangle?

A

superior belly of omohyoid muscle, posterior belly of digastric muscle, anterior border of SCM. Contains the carotid sheath (CN X, carotid arteries, internal jugular vein)

56
Q

What are the boundaries of the Muscular Triangle?

A

anterior midline of neck, superior belly of omohyoid muscle, anterior border of SCM muscle. Contains thyroid and Parathyroid glands as well as the infrahyoid muscles.

Anatomy (17 decks)

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