Anterior Neck Flashcards

1
Q

anterior triangle of the neck boundaries

A

Inferior border of the mandible

Posterior border of the SCM

Anterior midline of the neck

Roof: platysma and the investing fascia

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2
Q

mental triangle boundaries

A

Between two anterior bellies of digastric m. and the hyoid bone

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3
Q

muscular triangle boundaries

A

superior belly of the omohyoid

lower anterior margin of the sternocleidomastoid

median line of the neck

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4
Q

submandibular triangle boundaries

A

posterior and anterior bellies of the digastric m.

inferior border of the mandible

floor: mylohyoid, hypoglossus, middle constrictor m.

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5
Q

carotid triangle boundaries

A

anterior border of SCM

superior belly of omohyoid

posterior belly of digastric m.

stylohyoid

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6
Q

Which vessel lies in superficial fascia lateral to the SCM?

A

external jugular vein

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7
Q

Anterior jugular v.s can drain into…

A

EJV or into subclavian v. (deep to SCM)

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8
Q

suprahyoid muscles

A

mylohoyoid
anterior belly of digastric
posterior belly of digastric
stylohyoid

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9
Q

infrahyoid muscles

A

thyrohyoid
sternohyoid
sternothyroid
superior, inferior belly of omohyoid

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10
Q

the parotid gland overlays which muscles?

A

suprahyoids

stylohyoid and posterior belly of digastric

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11
Q

Which a./v. cross inferior border of mandible and travel superiorly?

A

the FACIAL artery and vein

br. of external carotid a.

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12
Q

which nerves supply the digastric m. (anterior belly) and mylohyoid?

A

n. to mylohyoid (br. of mandibular division of trigeminal, CN V3)

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13
Q

Which n. supplies the digastric m. (posterior belly) and the styloyoid?

A

branches of facial n. (CN VII)

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14
Q

Inferior alveolar n.

A

br. of CN V3 (mandibular division of trigeminal)

(enters the mandible through the mandibular foramen, passes along the mandibular canal, exits through the mental foramen)

sensory to teeth

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15
Q

branches of CN V3 after it emerges from the foramen ovale

A

inferior alveolar n. –> n. to mylohyoid

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16
Q

______ nerve emerges from the stylomastoid foramen

A

facial nerve

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17
Q

two actions of the thyrohyoid m.

A
  • depress hyoid bone

- elevate thyroid cartilage

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18
Q

ansa cervicalis

A

from C1-C3

innervates infrahyoid m. EXCEPT thyrohyoid

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19
Q

Innervation to thyrohyoid m.

A

directly innervated by a branch of C1 that piggy backs w/ hypoglossus n. (CN XII)

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20
Q

Which two roots of the ansa cervicalis piggy back with the hypoglossal n.?

A

Superior part of C1

Superior part of C2

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21
Q

Inferior loop of ansa cervicalis

A

descendens cervicalis

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22
Q

Superior loop of ansa cervicalis

A

desendens hypoglossi

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23
Q

upper loop of ansa cervicalis

A

C1

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24
Q

lower loop of ansa cervicalis

A

C2-C3

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25
thyroidhyoid and geniohyoid are innervated by branches of ___ that hitch-hike on the _________ n.
thyroidhyoid and geniohyoid are innervated by branches of C1 that hitch-hike on the HYPOGLOSSAL n.
26
all infrahyoid muscles except the _______ are innervated by ansa cervicalis
all infrahyoid muscles except the THYROHYOID are innervated by ansa cervicalis
27
carotid triangle
IJV, CCA, vagus n. surrounded by carotid sheath
28
Which vein is just lateral to the common carotid artery
internal juglar vein
29
vagus n. lies between and just behind
internal juglar vein and common carotid artery
30
n. structure coming around medial and lateral side of internal jugular vein and then join together
ansa cervicalis
31
Where should you palpate the carotid pulse?
depression just anterior to SCM and below mandible
32
right common carotid a. is a branch of the
brachiocephalic trunk
33
Internal carotid a. vs external carotid a., which is anterior
external carotid a. is ANTERIOR to internal carotid a.
34
left common carotid a. is a branch of the
arch of aorta
35
the common carotid a. divides into internal and external carotid at ~ level of the
upper edge of thyroid cartilage
36
the subclavian a. is divided into 3 parts by which m.?
anterior scalene m.
37
The r. recurrent laryngeal n. crosses almost 90 degrees to which vessel?
inferior thyroid a.
38
Which branches of the internal carotid a. travel into the neck?
NONE. Internal carotid has no branches in the neck. Main job is in brain via cerebral arteries.
39
Branches of the external carotid artery
SALFOPSMax - superior thyroid - ascending pharyngeal - lingual - facial - occipital - posterior auricular - superficial temporal - maxillary
40
Middle meningeal a. is a branch of which a.?
maxillary a.
41
External carotid a. supplies everything outside the dura mater EXCEPT ...
the anterior forehead, which is supplied by internal carotid a. via the supraorbital a. (br. of ophthalmic a.)
42
arteries contributing to arterial circle of willis
``` Anterior cerebral aa. Middle cerebral a. Posterior communicating a. posterior cerebral a. basilar a. vertebral aa. ```
43
receptor in carotid body
chemoreceptors | detect pO2, pCO2
44
receptors in carotid sinus
baroreceptors | detect pressure
45
innervation of carotid body/sinus
Visceral sensory. Carotid sinus n. (branch of CN IX glossopharyngeal)
46
carotid sinus reflex
If palpate the carotid pulse too hard, carotid sinus is overstimulated --> decreased HR, syncope HR slowed by vagus nerve (CN X)
47
sympathetic chain (cervical) lies behind ________
sympathetic chain lies behind CAROTID SHEATH
48
branches off of IJV
``` occipital v pharyngeal vv. facial v. lingual v thyroid v. (superior, middle) ```
49
superficial lymph nodes of the neck/head
``` occipital mastoid parotid submandibular submental ```
50
deep cervical nodes are divided into superior deep and inferior deep groups by _____________
omohyoid
51
lymph node inflammed with pharyngitis
jugulo-digastric LN
52
lymph node swollen with disease in thorax/abdomen
supraclavicular LN
53
what drains lymphatics from head?
internal jugular trunk empties into R thoracic duct on right // thoracic duct on left
54
hormones produced by thyroid gland
T3/T4: regulate metabolism Calcitonin: regulates Ca++ levels in blood
55
thyroid gland lies posterior to ______, anterior/lateral to ________ and __________, medial to _________.
thyroid gland lies posterior to INFRAHYOID MUSCLES, anterior/lateral to TRACHEA and ESOPHAGUS, medial to CAROTID SHEATH.
56
superior and middle thyroid veins drain into__________
internal jugular vein
57
pyramidal lobe of thyroid
remnant of thyroglossal duct (foramen cecum to thyroid gland)
58
What stimulates the thyroid gland? Regulation?
TRH/TSH from hypothalamus/pitutary. | High levels of T3/T4 produce negative feedback on TRH/TSH to maintain a constant level.
59
goiter
hypertrophy of thyroid gland. | Absence of iodine causes absence of T3/T4 --> increased TRH/TSH --> hypertrophy
60
parathyroid hormone
Regulates level of calcium in blood/bones/GI system. | 4 parathyroid glands (2 superior, 2 inferior)
61
tracheotomy
Operative procedure that creates a surgical opening in the cervical trachea. Indications: foreign body obstruction of upper airway, bilateral vocal chord paralysis, tumors of larynx and upper airway, trauma to upper airway
62
tracheostomy
creation of a permanent/semipermanent opening in the trachea
63
tracheostomy palpable landmarks
thyroid cartilage notch, | cricoid cartilage, trachea
64
where to make the incision for a tracheostomy?
transverse incision, one fingerbreadth above the jugular notch
65
things to avoid when doing a tracheostomy
brachiocephalic trunk, | left brachiocephalic vein,
66
cricothyrotomy - what do you cut? when do you use it?
longitudinal cut along cricothyroid membrane. Used when: - can't intubate or ventilate - emergency situation SAFER than a tracheotomy