CH 23

Question 1

congenital absence of one or both eyes

Answer 1

Anophthalmia

Question 2

Short broad head because of premature suture fusion

Answer 2

Brachycephaly

Question 3

Congenital anomalaies of the head cause by teratogens or development disruptions of the nervous system

Answer 3

Cebocephaly

Question 4

Central portion of the cerebellum between the hemispheres

Answer 4

Vermis

Question 5

Substance that interferes with embryonic development

Answer 5

Teratogen

Question 6

Toward the cephalic/head end

Answer 6

Rostral

Question 7

Posterior displacement of the maxilla and mandible

Answer 7

Retrognathia

Question 8

Disease characteristic

Answer 8

Pathognomonic

Question 9

Graph

Answer 9

Nomogram

Question 10

Nostrils

Answer 10

Nare

Question 11

Either the rostral or caudal end of the neural tube

Answer 11

Neuropore

Question 12

Dilatation or distention of a hollow structure

Answer 12

Ectasia

Question 13

Malformation of an organ or structure

Answer 13

Dysmorphic

Question 14

Abnormally formed organs

Answer 14

Dysgenesis

Question 15

Long narrow head

Answer 15

Dolichocephaly

Question 16

Congenital brain anomaly resulting from a migrational defect of the occipital horns of the lateral ventricles leading to ventricular enlargement

Answer 16

Colpocephaly

Question 17

The choroid plexus invaginates into the

Answer 17

Ventricles

Question 18

The mentencephalon and myelencephalon are part of the

Answer 18

Rhombencephalon

Question 19

The corpus callosum, cerbellar vermis, sulci, gyri, migration of the germinal matric, and myelination develop after

Answer 19

15 weeks gestation

Question 20

BPD is measured at the level of the __ and columns of the fornix

Answer 20

Thalami

Question 21

What is the alternative measurement to the BPD

Answer 21

HC

Question 22

The most studied artery in the fetal brain is the

Answer 22

MCA

Question 23

A normal cisterna magna measurement is less than

Answer 23

1 cm

Question 24

The most frequent anomaly noted with a cleft palate or cleft lip is

Answer 24

Club foot

Question 25

Fetuses with hypoplastic mandible anomalies are at risk of acute neonatal

Answer 25

Respiratory distress

Question 26

Sonographic features of meroanencephaly include

Answer 26

Frog-like appearance

Question 27

A fetal brain with no recognizable cerebral cortex and defined thalami and cerebellum is

Answer 27

Hydranencephaly

Question 28

Agenesis of the corpus callosum reveals all except

Answer 28

Hypertelorism

Question 29

Dandy walker malformation consists of

Answer 29

Marked cystic dilation of the fourth ventricle

Question 30

Lissencephaly is an absence or paucity of gyri resulting in the characteristic appearance of

Answer 30

Smooth cerebral surface after 20 weeks

Question 31

A marked retroflexed neck is an indication of

Answer 31

Iniencephaly

Question 32

A correct measurement of the BPD involves placing two cursors at the

Answer 32

Outer edge of the proximal skull to the inner edge of the distal skull

Question 33

Enlargement of the ventricles and cerebrospinal fluid displacement of the choroid plexus results in a condition called

Answer 33

Dangling choroid plexus

Question 34

Bleeding anywhere in the fetal cranium is known as all except

Answer 34

Petechial hemorrhage

Question 35

A measurement of the lateral ventricular atrium should not exceed

Answer 35

1 cm

Question 36

The forebrain is also known as

Answer 36

Prosencephalon

Question 37

Many brain structures develop between week __

Answer 37

3 & 16

Question 38

The great cerebral vein is also called

Answer 38

vein of galen

Question 39

The third ventricle is positioned between the ___ and the frontal horns of the lateral ventricles

Answer 39

thalami

Question 40

A microcephalic fetus may demonstrate __ ventricles

Answer 40

enlarged ventricles

Question 41

The best angle of insonation to obtain peak velocity of the MCA is less than __ degrees

Answer 41

15

Question 42

A decreased interorbital distance is

Answer 42

hypotelorism

Question 43

Between ____ weeks, the transverse cerebellar diamter measured in mm correlates 1:1 with the gestational age

Answer 43

16 & 24

Question 44

A cerebral development disorder that involves disorered neuronal migration

Answer 44

Schizenecephaly

Question 44

Holoprosencephaly is divided into

Answer 44

alobar, semilobar, lobar varieties

Question 45

Small head

Answer 45

Microcephaly

Question 46

Protrusions of the meninges and frequently of brain substance through a defect in the cranium is

Answer 46

Cephalocele

Question 47

To obtain the MCA peak velocity, image the fetal head in a __ plane

Answer 47

transverse

Question 48

The tongue extending beyond the teeth or alveolar ridge is

Answer 48

Macroglossia

Question 49

A sonolucent in the choroid plexus is known as

Answer 49

Chronic plexus cyst

Question 50

Macrocepaly is defined as a head circumference ___ standard deviations ___ the mean for GA

Answer 50

2-3 / above

Question 51

____ an abnormal increase in the vlume of the cerebral ventricles

Answer 51

Ventriculomegaly

Question 52

Arnold hiari malformations often have accompanying

Answer 52

spina bifida

Question 53

The presence of a single median bony orbit with a fleshy proboscis about it is

Answer 53

cyclopa

Question 54

The BPD maintains the closest cooreltion with ga in the ___ trimester

Answer 54

first, and early second