Lab Practical

Question 1

height of the orbital entrance

Answer 1

35 mm

Question 2

width of the orbital entrance

Answer 2

40 mm

Question 3

orbital depth

Answer 3

40 mm

Question 4

length of the optic canal

Answer 4

4-9 mm

Question 5

angle formed between theoretical intersection of the optic canals

Answer 5

75 degrees

Question 6

volume of the orbit

Answer 6

29 mL

Question 7

orbital index (Broca):
Megaseme

Answer 7

> 89

Question 8

orbital index (Broca):
Mesaseme

Answer 8

84-89

Question 9

orbital index (Broca):
microseme

Answer 9

< 84

Question 10

inferior margin bones: (2)

Answer 10

1. zygomatic bone

2. maxilla

Question 11

medial margin bones: (2)

Answer 11

1. frontal process maxilla

2. posterior lacrimal crest

Question 12

lateral margin bones: (2)

Answer 12

1. zygomatic process frontal

2. zygomatic bone

Question 13

superior margin bone: (1)

Answer 13

1. frontal bone

Question 14

orbital wall bones:

Floor (3)

Answer 14

1. orbital plate maxilla
2. orbital surface zygomatic
3. orbital process palatine

Question 15

orbital wall bones:

Lateral (2)

Answer 15

1. greater wing sphenoid

2. orbital surface zygomatic

Question 16

orbital wall bones:

Roof (2)

Answer 16

1. orbital plate frontal

2. lesser wing sphenoid

Question 17

orbital wall bones:

Medial (4)

Answer 17

1. lamina papyracea (ethmoid)
2. frontal process of maxilla
3. lacrimal bone
4. sphenoid

Question 18

orbital index of Broca

Answer 18

(height of orbit x100) / width of orbit

Question 19

sexual differences:

superior orbital margin

Answer 19

sharper in the female

Question 20

sexual differences:

supraorbital ridge

Answer 20

more pronounced in males

Question 21

sexual differences:

forehead

Answer 21

more vertical in females

Question 22

sexual differences:

zygomatic process of frontal process

Answer 22

more robust (wider and thicker) in the male