Anterior Triangle of Neck Flashcards

1
Q

What are the boundaries of the anterior triangle of the neck?

A

Anterior: midline of the neck
Posterior: anterior border of the sternocleidomastoid
Superior: Mandible

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2
Q

what are the 4 infrahyoid muscles?

A

omohyoid
sternohyoid
thyrohyoid
sternothyroid

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3
Q

what is the innervation of the sternohyoid

A

ansa cervicalis (C1-C3)

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4
Q

what is the innervation of the sternothyroid

A

ansa cervicalis (C1-C3)

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5
Q

what is the innervation of the thyrohyoid?

A

C1 fibers via hypoglossal nerve

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6
Q

what fibers make up the ansa cervicalis?

A

fibers from C1- to C3

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7
Q

what does the ansa cervicalis supply?

A

both bellies of omohyoid
sternohyoid
sternothyroid
thyrohyoid + geniohyoid

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8
Q

what is the innervation of the posterior and anterior belly of the digastric muscles?

A

posterior- facial nerve

anterior- nerve to mylohyoid

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9
Q

what are the suprahyoid muscles?

A

digastric
stylohyoid
mylohyoid
geniohyoid

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10
Q

what innervates the stylohyoid?

A

facial nerve

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11
Q

what innervates the mylohyoid?

A

nerve to the mylohyoid

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12
Q

what innervates the geniohyoid?

A

C1 fibers

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13
Q

what are the anterior vertebral muscles?

A

longus capitis
longus colli
rectus capitis anterior
rectus capitis lateralis

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14
Q

what is the innervation of the longus capitis?

A

ventral rami of C1 to C3

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15
Q

what is the innervation of the longus colli?

A

ventral rami of C2 to C6

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16
Q

what is the innervation of the rectus capitis anterior and lateralis?

A

: ventral rami of C1 and C2

17
Q

what are the 3 parts of the longus colli?

A

inferior oblique
superior oblique
vertical

18
Q

what makes up the boundaries of the submandibular triangle?

A

posterior belly of digastric + stylohyoid
anterior belly of digastric
inferior border of mandible
floor- mylohyoid

19
Q

what are the contents of the submandibular triangle?

A
Submandibular gland
Facial vessels (A + V)
Submandibular lymph nodes
Hypoglossal nerve
Mylohyoid nerve and vessels (A + V
20
Q

what are the boundaries of the carotid triangle?

A

anterior border of sternocleidomastoid
posterior belly of digastric
superior belly of omohyoid

21
Q

what runs through the carotid triangle?

A
Common carotid
Initial segments of external and internal carotid 
Some branches of external carotid
Internal jugular + some tributaries
Vagus
Accessory
Hypoglossal
Ansa cervicalis
Internal and external laryngeal nerves 
Deep cervical lymph nodes
22
Q

what are the boundaries of the muscular triangle of the neck?

A

anterior midline of the neck
superior belly of omohyoid
anterior border of sternocleidomastoid

23
Q

what runs through the muscular triangle?

A

sternohyoid

sternothyroid

24
Q

what are the boundaries of the submental triangle?

A

both anterior bellies of digastric muscles
hyoid bone
floor- mylohyoid muscle

25
What is the action of the sternohyoid m.?
Depresses hyoid bone
26
What is the action of the sternothyroid m.?
Depresses larynx
27
What is the action of the thyrohyoid?
Depresses hyoid bone or elevates the larynx
28
What is the action of the digastric muscle?
Depresses the mandible or elevates hyoid bone
29
What is the action of the stylohyoid m.?
Lifts up the hyoid bone and draws it backwards
30
What is the action of the mylohyoid?
Elevates the floor of the mouth, depresses the mandible, and elevates the hyoid bone
31
What is the action of the geniohyoid?
Elevates the hyoid bone and draws it forward
32
What is the action of the longus capitis?
Flexion of head and neck
33
What is the action of the longus colli?
Flexion of the neck
34
What is the action of the rectus capitis anterior?
Flexion of the head
35
What is the action of the rectus capitis lateralis?
Lateral flexion of head to one side