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Dental Anatomy Test 4 Ch.18 > Ch.18 Development Of Orofacial Complex > Flashcards

Ch.18 Development Of Orofacial Complex Flashcards

1
Q

What are the 3 Embryologic Stages?

A
  1. Period of the Ovum-Fertilization through 2 weeks
  2. Period of the Embryo(embryologic)- Weeks 3-8
  3. Period of the Fetus- Weeks 9-36
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2
Q

At what stage do the early features of the face begin to develop?

A

The Embryonic Stage (3 Weeks)

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3
Q

What is the tube called that is closed on upper and lower ends and runs through the middle of the body?

A

The developing digestive tract

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4
Q

How many parts is the Developing Digestive Tract divided into?

A

3

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5
Q

What are the 3 parts of the Developing Digestive Tract?

A
  1. Foregut(upper part)- forms Digestive tube from throat region to the duodenum.
  2. Midgut(Middle Portion)-Forms the rest of the small intestine, cecum, ascending colon, and most of the transverse colon.
  3. Hindgut(lower)-Forms descending colon, sigmoid colon, and rectum of large intestine.
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6
Q

At what age does an embryos length measure approximately 3-4 mm from the top of the head to the tail area?

A

3 weeks old

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7
Q

The primitive oral depression is known as what?

A

Stomodeum

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8
Q

What arches are identified as Roman numerals l and ll?

A

The upper two pharyngeal arches

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9
Q

What are the upper two pharyngeal arches?

A

l. Mandibular Arch

ll. Hyoid Arch

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10
Q

Which of the pharyngeal arches begin to show growth which will be the maxillary process?

A

The Mandibular Arch

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11
Q

The mandibular Arch can be subdivided into 2 different processes being?

A

Mandibular Process and Maxillary Process

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12
Q

What will the mandibular process form?

A

The Mandible

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13
Q

What will the Maxillary Process form?

A
  • The Maxillae
  • The zygomatic Bones of the cheeck
  • The Palatine bones
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14
Q

What do the palatine bones form?

A

The hard palate in the food of the mouth

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15
Q

Nasal Pits

A

Small depressions that form low on the frontal prominence during the 4th embryonic week

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16
Q

What do the 2 medical nasal processes do by the 6th week?

A

They fuse together and, along with the two Maxillary Processes, form the upper lip

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17
Q

What fills in the groove that lies between the two nasal processes?

A

The medial nasal and the Maxillary processes

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18
Q

Migration

A

When there is an increase in the connective tissue of the upper lip area of the groove and the groove fills in and slowly disappears

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19
Q

Cleft lip

A

When a migration fails and separation occurs between the medial nasal Process and Maxillary Process

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20
Q

When does cleft lip form?

A

Around the 6th embryonic week

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21
Q

Hare Lip

A

When the two medial nasal processes do not fuse together (midline cleft of the upper lip)

22
Q

How did hare lip get it’s name?

A

It resembles the cleft in the upper lip of a rabbit

23
Q

What Forms the hard palate?

A

The right and left Maxillary processes and the medial nasal processes

24
Q

What happens during the 11th week of development with the 2 Maxillary Processes?

A

After fusing with the primary palate they then fuse with one another.
-This happens 1st in the anterior region then moves backwards like a zipper being zipped from front to back.

25
Q

What happens during the 7th-8th week of development with the 2 Maxillary Processes?

A

Fuses with the primary palate

26
Q

Around how many weeks of development does the cleft palate usually develop?

A

Between the 7th and the 11th week

27
Q

A combined cleft lip and palate occurs in about how many births for whites?

A

1:700

28
Q

What race is cleft lip more common in?

A

Asians

Ratio- 1:350

29
Q

Cleft lip is less common in what race?

A

Blacks

Ratio- 1:1400

30
Q

What is the ratio for cleft lip that involves only the palate and not the lip?

A

1:2500

31
Q

What are the two most common types of cleft lip?

A

Unilateral and bilateral clefts

32
Q

What can be treated surgically with good results?

A

Cleft Lip

33
Q

When does cleft lip develop?

A

3-6 weeks after fertilization

34
Q

What kind of factors are involved in the development of clefts?

A

Hereditary

35
Q 
Environmental Factors
(People that have a greater risk of suffering from birth defects such as cleft lips) :
A

Pregnant woman abuses various kinds of drugs(legal/illegal), smokes/drinks heavily, or is in an environment that may have potentially damaging pollutants

36
Q

Pharyngeal grooves (clefts)

A

The depressions on the neck surface

37
Q

Pharyngeal pouches

A

The depressions on the inside of the neck

38
Q

What does each arch consist of?

A
  • Bar of cartilage
  • An artery
  • A cranial nerve
  • A mesodermal tissue
39
Q

What are the 3 cranial nerves and their arches?

A 
1. Trigeminal 
(Arch l)
2. Vll (Facial) 
(Arch ll)
3. lX Glossopharyngeal
(Arch lll)
4. X (Xl) Vagus (Accesory)
(Arch lV and Vl)
40
Q

Muscle(s) of the trigeminal cranial nerve:

A
  • Muscles of Mastication
  • Mylohoid
  • Anterior digastric
  • Tensor tympani (in ear)
  • Tensor veli palatine
41
Q

Muscle(s) of the facial (Vll) cranial nerve:

A
  • muscles of Facial Expression
  • Posterior digastric
  • Stylohyoid
  • Stapedius (in ear)
42
Q

Muscle(s) of the glossopharyngeal (lX) cranial nerve:

A

Stylopharyngeus

43
Q

Muscle(s) of the Vagus (X or Xl) cranial nerves:

A
  • Muscle of larynx
  • Muscle of pharynx
  • Most muscles of soft palate
44
Q

Cartilage/Bone in trigeminal cranial nerve:

A

Malleus and incus bones

45
Q

Cartilage/Bone in Facial cranial nerve:

A
  • Stapes
  • Styloid Process
  • Lesser corny of hyoid
  • Upper body of hyoid
46
Q

Cartilage/Bone of the glossopharyngeal cranial nerve:

A
  • Greater cornu if hyoid

- Lower body of hyoid

47
Q

Cartilage/Bone of the Vagus cranial nerve:

A

Cartilages of larynx

48
Q

A small depression in the middle of the tongue is know as what?

A

Foramen Cecum

49
Q

The point where the thyroid gland begins to develop and then migrate downward, eventually lying in the lower front neck region is called what?

A

Foramen Cecum

50
Q

What is it called when the patients tube doesn’t grow downward but instead forms into a big red lump at the back of the tongue?

A

Lingual Thyroid Nodule

Dental Anatomy Test 4 Ch.18 (1 decks)

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