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Neuro > Submandibular region > Flashcards

Submandibular region Flashcards

1
Q

oral cavity proper

A

area between teeth (palate to tongue, continuous with oropharynx)

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2
Q

vestibule

A

area between cheek and teeth

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3
Q

lips inn.

A

upper lip: V2 (infraorbital n.)

lower lip: V3 (mental and buccal nn.)

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4
Q

lips lymphatic drainage

A

upper lip: ipsilaterally to submandibular nodes
central lower lip: ipsilaterally to submental nodes
lateral lower lip: bilaterally to submandibular nodes

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5
Q

inn. to upper teeth

A

superior alveolar divisions (V2)

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6
Q

inn. to lower teeth

A

inferior alveolar divisions (V3)

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7
Q

tongue components

A
  1. body (anterior 2/3), mobile
  2. root (posterior 1/3), fixed
  3. epiglottic region
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8
Q

body and root of tongue separated by

A

terminal sulcus

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9
Q

filiform papillae

A

small conical projections, no taste buds

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10
Q

fungiform papillae

A

medium, dome-shaped

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11
Q

circumvallate papillae

A

large, round, bulk of taste receptors

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12
Q

intrinsic muscles of tongue

A
  1. superior longitudinal m.
  2. vertical and transverse mm.
  3. inferior longitudinal m.
    Inn. CN XII (GSE), change shape of tongue
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13
Q

extrinsic muscle of tongue

A
  1. genioglossus
  2. hyoglossus
  3. styloglossus
  4. palatoglossus

Move tongue

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14
Q

genioglossus

A

protrudes tongue, pushes tongue to opposite side acting unilaterally. CN XII (GSE)

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15
Q

hyoglossus

A

retracts, depresses tongue. CN XII (GSE)

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16
Q

styloglossus

A

retracts, elevates tongue. CN XII (GSE)

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17
Q

palatoglossus

A

pulls tongue and soft palate together. CN X (SVE)

18
Q

CN XII lesion

A

tongue protrudes to side of lesion

19
Q

general sensation to anterior tongue

A

lingual n. (V3)

20
Q

taste to anterior tongue

A

facial n. (chorda tympani)

21
Q

general sensation and taste to posterior tonge

A

CN IX

22
Q

general sensation and taste to epiglottic region

A

CN X

23
Q

blood supply to tongue and oral cavity

A

lingual a. (br. from external carotid)

24
Q

tongue lymph drainage

A

posterior tongue: superior deep cervical nodes
apex of tongue: bilateral to submental nodes
middle lateral tongue: ipsilateral to submandibular nodes
central middle tongue: contralateral to inferior deep cervical nodes (jugulo-omohyoid node)

25
Q

Waldeyer’s Ring

A

pharyngeal, tubal, palatine, and lingual tonsils

26
Q

parasympathetic inn. to parotid gland

A
  1. pregang. cell bodies: salivatory nucleus in brainstem
  2. pregang. fibers: CN IX (tympanic and lesser petrosal branches)
  3. postgang. cell bodies: otic ganglion
  4. postgang. fibers: V3 (auriculotemporal n.)
27
Q

parasympathetic inn. to submandibular and sublingual glands

A
  1. pregang. cell bodies: salivatory nucles in brainstem
  2. pregang. fibers: CN VII (chorda tympani)
  3. postgang. cell bodies: submandibular ganglion
  4. postgang. fibers: V3 (lingual n.)
28
Q

sympathetic inn. to salivary glands

A
  1. pregang. cell bodies: T1-T4 lateral horn
  2. pregang. fibers: sympathetic chain
  3. postgang. cell bodies: superior cervical ganglion
  4. postgang. fibers: external carotid n.
29
Q

submandibular triangle boundaries

A

mandible and two bellies of digastric

30
Q

contents of submandibular triangle

A
  1. superficial submandibular gland
  2. CN XII
  3. facial a.
31
Q

digastric

A

depresses mandible, elevates hyoid
anterior belly: V3 (arch 1)
posterior belly: VII (arch 2)

32
Q

stylohyoid

A

elevates and retracts hyoid. CN VII

33
Q

mylohyoid

A

forms floor of oral cavity, elevates hyoid and floor of mouth. V3 (mylohyoid br.)

34
Q

geniohyoid

A

elevates hyoid, opens mouth with hyoid fixed. C1 via CN XII

35
Q

paralingual space

A

between mylohyoid and hyoglossus

  1. CN XII
  2. venous plexus
  3. lingual n.
  4. submandibular gland and duct
36
Q

major nerves of oral cavity

A
  1. lingual n. (V3)
  2. CN IX
  3. CN X
  4. CN XII
37
Q

lingual n. functions

A
  1. GSA to body of tongue
  2. distributes SVA to body of tongue (via chorda tympani)
  3. distributes GVE-P to submandibular and sublingual glands
38
Q

hypoglossal n. functions

A

GSE to all intrinsic tongue mm.

GSE to all extrinsic tongue mm. except palatoglossus (X)

39
Q

glossopharyngeal n. functions

A
  1. GSE to sylopharyngeus

2. GVA and SVA to root of tongue

40
Q

vagus n. functions

A
  1. GVA and SVA to epiglottic region of tongue

2. SVE to palatoglossus

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