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Gross II > Unit I Triangles of the Neck > Flashcards

Unit I Triangles of the Neck Flashcards

1
Q

The SCM, when viewed laterally, divides these two triangles

A

the anterior and posterior triangles

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2
Q

The anterior boundary of the posterior triangle is

A

the posterior border of the SCM

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3
Q

the posterior boundary of the posterior triangle is

A

the anterior border of the trapezius

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4
Q

The inferior boundary of the inferior triangle is

A

the superior border of the middle 1/3 of the clavicle

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5
Q

The superior boundary of the anterior triangle is

A

the inferior border of the mandible

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6
Q

The anterior border of the anterior triangle is

A

the anterior midline

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7
Q

The posterior border of the anterior triangle is

A

the anterior border of the SCM

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8
Q

List the subdivisions of the anterior triangle

A

submental, submandibular (digastric), carotid, and muscular triangles

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9
Q

What is the only unpaired triangle of the subdivisions of the anterior traingle?

A

the submental triangle

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10
Q

List the boundaries of the submental triangle

A

left and right anterior bellies of the digastric, and the body of the hyoid

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11
Q

What is the floor of the submental triangle?

A

the mylohyoid muscle

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12
Q

What is contained in the submental triangle?

A

minor veins and lymph nodes

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13
Q

What are the boundaries of the submandibular triangle?

A

inferior border of mandible, anterior belly of the digastric, and the posterior belly of the digastric

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14
Q

What is the floor of the submandibular triangle?

A

mylohyoid and hyoglossus muscles

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15
Q

What is contained in the submandibular triangle?

A

the submandibular gland, internal carotid artery, facial artery, internal jugular vein, glossopharyngeal nerve (CN IX), and vagus nerve (CN X)

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16
Q

What are the boundaries of the carotid triangle?

A

the posterior belly of digastric, superior belly of omohyoid, and anterior border of the SCM

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17
Q

What makes the floor of the carotid triangle?

A

portions of the thyrohyoid, hyoglossus, and inferior and middle contrictor muscles

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18
Q

What is contained within the carotid triangle?

A

parts of the common and internal carotid arteries, the external carotid artery and three of its branches, and tributaries of the internal jugular vein.

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19
Q

What are the three branches of the external carotid artery included within the cartoid traingle?

A

superior thryroid artery, lingual artery, and facial artery

20
Q

What are the boundaries of the muscular triangle?

A

superior belly of omohyoid, anterior midline of the neck, and anterior border of the SCM

21
Q

What makes the floor of the muscular triangle?

A

posterior layer of the pretracheal fascia

22
Q

What is contained within the muscular triangle?

A

sternohyoid and sternothyroid muscles, thyroid gland, trachea, and esophagus

23
Q

What bone is often broken in strangulation cases of murder?

A

the hyoid bone

24
Q

Where is the hyoid located?

A

between the mandible and larynx

25
Q

What is the primary function of the infrahyoid muscle?

A

they move the hyoid and larynx

26
Q

List the infrahyoid muscles

A

omohyoid, sternohyoid, sternothyroid, and thyrohyoid

27
Q

What muscles make up the superficial layer of the infrahyoid muscles?

A

omohyoid and sternohyoid

28
Q

What muscles make up the deep layer of the infrahyoid muscles?

A

sternohyoid and sternothyroid

29
Q

What is the origin of the inferior belly of the omohyoid?

A

the upper border of the sacpula

30
Q

Where does the inferior belly of the omohyoid end?

A

an intermediate tendon deep to the SCM

31
Q

What is the origin of the superior belly of the omohyoid?

A

it extends upwards from the intermediate tendon where the inferior belly ends

32
Q

What is th insertion of the omohyoid?

A

body of the hyoid bone

33
Q

What is the innervation of the omohyoid?

A

the ansa cervicalis (C1-C3)

34
Q

Function of the omohyoid

A

depresses hyoid and larynx

35
Q

Origin of the sternohyoid

A

posterior surface of manubrium, and medial end of the clavicle

36
Q

Insertion of the sternohyoid

A

body of the hyoid

37
Q

Innervation of the sternohyoid

A

ansa cervicalis (C1-C3)

38
Q

Function of the sternohyoid

A

depresses hyoid and larynx

39
Q

Origin of the sternothyroid

A

posterior surface of manubrium, and inferior to origin of sternohyoid

40
Q

Insertion of sternothyroid

A

oblique line on lamina of thyroid cartilage

41
Q

Innervation of sternothyroid

A

ansa cervicalis (C1-C3)

42
Q

Function of sternothyroid

A

depresses the larynx

43
Q

Origin of thyrohyoid

A

oblique line on lamina of thyroid cartilage

44
Q

Insertion of thyrohyoid

A

body of hyoid

45
Q

Innervation of thyrohyoid

A

C1 through hypoglossal

46
Q

Function of thyrohyoid

A

depresses hyoid bone

47
Q

Why do we need the muscles to depress the hyoid and larynx?

A

Swallowing, talking, respiration, and if hyoid is fixed, the digastric depresses the mandible

Gross II (9 decks)

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