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Module 1 > Craniofacial Development > Flashcards

Craniofacial Development Flashcards

1
Q

Pharyngeal arches begin development in week ____

A

4

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2
Q

Face forms between weeks _______ or ____

A

weeks 5-7 or 8

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3
Q

Palate formation occurs in weeks ______ to______

A

6.5-10

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4
Q

T/F the skull continues to grow after birth

A

True, skull sutures do not fully close until later in life (40s or 50s)

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5
Q

The bones of the skull, face, and pharynx are derived from either ______ or ______

A

neural crest cells or paraxial mesoderm

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6
Q

Sphenoid is derived from _________

A

Paraxial mesoderm AND neural crest

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7
Q

Neural crest cells originiate at the ______

A

neural tube

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8
Q

Neural crest cells migrate out toward the _______

A

pharyngeal arches

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9
Q

pharyngeal arches form components of the ______

A

face and neck

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10
Q

Pharyngeal arch I is the

A

mandibular arch

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11
Q

Pharyngeal arch II is the

A

hyoid arch

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12
Q

Pharyngeal arch IV is a mixture of

A

IV and VI are structurally combined

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13
Q

Which pharyngeal arch is lost very early in embryological development

A

arch V

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14
Q

Meckel’s cartilage is derived from which arch

A

Pharyngeal arch I

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15
Q

What is Meckels cartilage

A

-template for where the mandible grows AROUND it
-Malleus and Incus from Meckel’s cartilage

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16
Q

What nerve is derived from pharyngeal arch 1

A

The trigeminal nerve (CN V)
-Sensory innervation for the head and neck
-motor component

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17
Q

Muscles of mastication are all derived from which arch

A

Pharyngeal Arch I
-temporalis, masseter, medial/lateral pterygoids

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18
Q

Tensor veli palatini and tensor tympani derive from which arch

A

pharyngeal Arch I

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19
Q

Which arteries are dervived fro pharyngeal arch I

A

maxillary artery and external carotid artery

20
Q

Reichert’s cartilage is derived from which pharyngeal arch?

A

II

21
Q

What is reichert’s cartilage?

A

Paired cartilages, contributing to hyoid bone, styloid process, and ear ossicle development

22
Q

What nerve is derived from Pharyngeal Arch II

A

Facial nerve (CN VII)

23
Q

Which muscles are derived from pharyngeal arch II

A

muscles of facial expression, posterior belly of digastric, stylohyoid

24
Q

what artery is derived from pharyngeal Arch II

A

the hyoid and stapedial arteries

25
Q

Reichert’s Cartilage gives rise to the

A
  1. Stapes
  2. Part of hyoid (lesser horn and upper part of the body)
  3. Styloid process and stylohoid ligament
26
Q

The greater cornu and inferior part of hyoid is derived from which arch

A

Pharyngeal arch III

27
Q

What nerve is derived from pharyngeal arch III

A

the Glossopharyngeal nerve (CN IX)

28
Q

What muscle is derived from pharyngeal arch III

A

the stylopharyngeus

29
Q

Which arteries are derived from pharyngeal arch III

A

The common carotid and internal carotid arteries.

30
Q

The oral part of the tongue comes from which arch

A

Arch 1 (the anterior 2/3rd)

31
Q

The pharyngeal part of the tongue comes from which arch?

A

Arch III (posterior 1/3rd)

32
Q

The root of the tongue comes from which arch?

A

Arch 4 (the eoiglottis)

33
Q

Tongue muscles originiate from ________, it develops before _______ muscles ad is completed by birth

A

Originates from somites, develops before masticatory muscles

34
Q

Development of facial prominences start at what week

A

week 4
-most key features partially developed by week 8

35
Q

Facial development is due to ________ and _______ of the facial prominces

A

Facial development is due to ENLARGEMENT AND MOVEMENT of the facial prominences

36
Q

The mandibular prominence is inferior to _____

A

the stomodeum

37
Q

The mandibular prominence gives rise to what two things

A

the mandible and lower lip

38
Q

Mandibular prominences fuse by week _____ in humans

A

week 7

39
Q

What prominence surrounds the forebrain?

A

The frontonasal prominence

40
Q

_______ prominence is superior to stomodeum

A

frontonasal

41
Q

The ______ prominence gives rise to the forehead, neurocranium, nostrils, part of the maxilla, and medial part of the upper lip

A

the frontonasal prominence

42
Q

What gives rise to medial nasal prominence and lateral nasal prominence

A

Mesenchymal proliferation

43
Q

What two prominences fuse to form the anterior palate?

A

The medical nasal prominence and maxillary prominence

44
Q

The gap between the maxillary prominence and lateral nasal prominence form the ______

A

Nasolacrimal groove

45
Q

The maxillary prominence gives rise to

A

the maxilla and palate, lateral part of the upper lip

Module 1 (4 decks)

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