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Sensory > Oral and Nasal Cavities > Flashcards

Oral and Nasal Cavities Flashcards

1
Q

The floor of the oral cavity is formed by:

A

The paired mylohyoid muscle, connected in the midline by a raphe
Paired geniohyoid muscles
The tongue

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2
Q

Oral cavity

A

Roof: hard + soft palate
Floor: muscular diaphragm and tongue
Lateral walls: fascia and skeletal muscle

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3
Q

The oral cavity open anteriorly to:

and posteriorly to:

A

The oral fissure

Oropharyngeal isthmus

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4
Q

Extrinsic muscles of the tongue

A

Palatoglossus
Styloglossus
Hyoglossus
Genioglossus

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5
Q

Intrinsic muscles of the tongue

A

Superior longitudinal
Vertical
Transverse
Inferior longitudinal

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6
Q

Innervation of the tongue

A

All muscles innervated by hypoglossal nerve, except palatoglossus which is by the vagus

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7
Q

Describe the potential spaces of the oral cavity

A

1: between mylohyoid and lateral border of hyoglossus
2: between hyoglossus and genioglossus

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8
Q

Structures in the 1st potential space

A

Lingual nerve
Hypoglossal nerve
Submandibular gland
Lingual vein

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9
Q

Structures in the 2nd potential space

A

Glossopharyngeal nerve

Lingual artery

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10
Q

Layers that need to be dissected to get to the submandibular gland

A

Skin
Subcutaneous fat
Periosteum
Investing layer

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11
Q

Three muscles closely related to the submandibular gland

A

Mylohoid
Hyoglossus
Posterior belly of digastric

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12
Q

Structures than run across the submandibular gland

A

Facial vein
Facial artery
Lymph nodes

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13
Q

Three nerves at risk during submandibular excision

A

Marginal mandibular
Lingual nerve
Hypoglossal nerve

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14
Q

Innervation of the tongue

A

Anterior 2/3 of tongue: special = chorda tympani, general = mandibular nerve
Posterior 1/3: glossopharyngeal nerve

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15
Q

The hard palate

A

Covered by muscosa

Formed by maxilla and palatine bones

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16
Q

Buccinator

A

In the same plane as the superior constrictor of the pharynx and together provide continuity between the walls of the oral and pharyngeal cavities
Holds the cheeks against the alveolar arches and keeps food between the teeth when chewing
Facial nerve innervation

17
Q

5 muscles of the soft palate

A 
Tensor veli palatini
Levator veli palatini
Palatopharyngeus
Palatoglossus
Musculus uvulae
18
Q

Tensor veli palatini

A

Has 2 parts: a vertical part from the hard palate and a horizontal aponeurosis which it joins with
Tenses soft palate and opens eustachian tube

19
Q

Levator veli palatini

A

Arises from petrous part of the temporal bone and eustachian tube
Pulls soft palate up and back to shut off nasopharynx

20
Q

Palatopharyngeus

A

Originates from palatine aponeurosis and hard palate

Elevates larynx and pharynx during swallowing

21
Q

Palatoglossus

A

Arises from palatine aponeurosis

Helps to elevate the tongue

22
Q

Musculus uvulae

A

Passes back from hard palate and fuses with counterpart in the uvula
Elevates and retracts uvula

23
Q

Arches of the oral cavity

A

Palatopharyngeal arches lie posterior and medial to the palatoglossal arches with the palatine tonsil between them on the lateral oropharyngeal wall

24
Q

3 regions of the nasal cavity

A

Respiratory region
Nasal vestibule
Olfactory region

25
Q

The nasal vestibule is lined by:

A

Skin and hair

26
Q

The respiratory region is lined by:

A

Ciliated and mucus cells

27
Q

The olfactory region is lined by:

A

Olfactory epithelium which contains olfactory receptors

28
Q

Bones of the nasal cavity

A 
Ethmoid
Sphenoid
Frontal
Vomer
Nasal
Maxillary
Palatine
Lacrimal
Inferior conchae
29
Q

Paranasal sinuses

A

Ethmoidal cells
Maxillary
Sphenoid
Frontal

30
Q

Paranasal sinus innervations

A

Frontal = ophthalmic
Maxillary = maxillary
Ethmoidal cells = both
Sphenoid = both

31
Q

Lymph drainage of the nasal cavity

A

Submandibular, deep cervical and retropharyngeal nodes

32
Q

Blood supply of the nasal cavity

A

Sphenopalatine artery which anastamoses with the superior labial and greater palatine arteries

33
Q

Nerve supply of the olfactory area

A

Olfactory nerve

34
Q

Nerve supply of the nasal vestibule

A

Infraorbital nerve

35
Q

Nerve supply of the respiratory area

A

Supplied anteriorly by anterior ethmoidal and anterior superior alveolar nerves
Posteriorly by branches from the pterygopalatine ganglion and greater palatine nerves

Sensory (9 decks)

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