L2: Fetal Skull

Question 1

Regions of fetal head

Answer 1

• Base of skull
• face
• vault

Question 2

Regions of fetal head

• Base of skull

Answer 2

Area from junction ( ) jaw & neck anteriorly to suboccipital region posteriorly.

Question 3

Regions of fetal head

• Face

Answer 3

• Area from junction ( ) jaw & neck to supraorbital ridges & glabella (bony prominence ( ) 2 supraorbital ridges) & is bounded laterally by 2 ears.

Question 4

Regions of fetal head

• Vault

Answer 4

Question 5

Extent of Vault of skull (cranium)

Answer 5

Area from root of nose & supraorbital ridges to suboccipital region.

Question 6

Bones of Vault of skull (cranium)

Answer 6

2 frontal bones, 2 parietal bones, 2 temporal bones, squamous portion of occipital bone & wings of sphenoid bones.

Question 7

Sutures of Vault of skull (cranium)

Answer 7

Question 8

Fontanelles of Vault of skull (cranium)

Answer 8

Question 9

Compare bwtewwn Anterior fontanelle & Posterior fontanelle in terms of

• Size
• Shape
• Formation
• Surrounding Bones
• Floor
• Overriding

Answer 9

Question 10

Regions of Vault of skull (cranium)

Answer 10

Question 11

Brow (sinciput or forehead)

Answer 11

• Area from root of nose & supraorbital ridges to
  anterior fontanelle & coronal sutures.

Question 12

Vertex

Answer 12

Question 13

Occipital region

Answer 13

Area ( ) posterior fontanelle & lambdoid sutures & line below occipital protuberance.

Question 14

Longitudinal Diameters of Fetal Skull

Answer 14

Question 15

Transverse Diameters of Fetal Skull

Answer 15

Question 16

Length of Suboccipito-bregmatic (SOB)

Answer 16

Question 17

Extent of Suboccipito-bregmatic (SOB)

Answer 17

Question 18

Importnace of Suboccipito-bregmatic (SOB)

Question 19

Length of Suboccipito-frontal (SOF)

Question 20

Extent of Suboccipito-frontal (SOF)

Question 21

Impotance of Suboccipito-frontal (SOF)

Answer 21

Question 22

Length of Occipito-frontal (OF)

Answer 22

Question 23

Extent of Occipito-frontal (OF)

Question 24

Importance of Occipito-frontal (OF)

Question 25

Length of **Submento-bregmatic (SMB)**

Question 26

Extent of **Submento-bregmatic (SMB)**

Answer 26

Question 27

Importance of **Submento-bregmatic (SMB)**

Answer 27

Question 28

Length of **Submento-vertical (SMV)**

Answer 28

Question 29

Extent of **Submento-vertical (SMV)**

Answer 29

Question 30

Importance of **Submento-vertical (SMV)**

Answer 30

Question 31

Length of Mento-vertical (MV)

Answer 31

Question 32

Extent of **Mento-vertical (MV)**

Answer 32

Question 33

Importance of **Mento-vertical (MV)**

Answer 33

Question 34

Length of **Biparietal diameter (BPD)**

Question 35

Extent of ****Biparietal diameter (BPD)****

Question 36

Importance of **Biparietal diameter (BPD)**

Question 37

Length of **Subparietal-supraparietal**

Question 38

Extent of **Subparietal-supraparietal**

Question 39

Importance of **Subparietal-supraparietal**

Question 40

length of **Bitemporal**

Question 41

Extent of **Bitemporal**

Question 42

Length of Bimastoid

Question 43

Extent of **Bimastoid**

Question 44

Importance of **Bimastoid**

Question 45

- with vertex presentation, all sutures are palpable during labor except ..... sutures, which are situated on either side covered by soft tissue parts & can't be felt in living fetus.

Answer 45

temporal

Question 46

Largest diameter of fetal head is: ....

Answer 46

Mento-vertical diameter (13.5 cm).

Question 47

Smallest diameter of fetal head is: .....

Answer 47

Bimastoid diameter (7.5 cm).

Question 48

- Smallest circumference of fetal head (32 cm) corresponds to plane of SOB diameter while largest circumference (34.5 cm) corresponds to plane of OF diameter.

Answer 48

...

Question 49

Importance of sutures & fontanelles

Answer 49

1) Diagnosis of presentation, position & attitude. 2) Allow moulding. 3) Follow up of progress of labor.

Question 50

Other fontanelles

Answer 50

There are 4 temporal fontanelles ( ) temporal bones & parietal bones.

Question 51

Def of **Glabella**

Answer 51

**Bony prominence ( ) 2 supraorbital ridges.**

Question 52

Def of **Nasion**

Answer 52

Root of nose just below glabella