Lecture 9 & 10

Question 1

Notes on the skull

Answer 1

Has 22 bones forming the bony framework of the head
The head is firmed mainly by the skull with the brain and it’s covering enclosed in the cranial cavity
United at immobile fibrous joints called sutures

Question 2

Cranium bones

Answer 2

Frontal bone
Occipital bone
parietal bone
ethmoid bone
temporal bone
sphenoid bone

Question 3

Facial bones

Answer 3

Zygomatic
vomer
mandible
Palatine
Maxilla
nasal
lacrimal
inferior nasal Conchae

Question 4

Composition of the cranial cavities

Answer 4

1. Consists of the base and the vault
   2) Contains the brain meninges
   portions of the cranial-nerve
   blood vessels and nerves
   

Question 5

Short note on the base of the cranial cavities

Answer 5

Has three depressions,
which are
the anterior cranial fossae,
middle cranial fossae
the posterior cranial fossa

Question 6

The vault

Answer 6

Dome shaped and consists of the
Parietal
Frontal
Occipital

Question 7

Short notes on the Hyoid

Answer 7

1) Consists of the greater and lesser horn and the body
2) U shaped
3) It is located between the voice box and mandible
4) Only bone in body that has no articulation
5) connects the floor of the oral cavity in the pharynx

Question 8

different of sutures

Answer 8

Lamoid
Coronal
Sagittal

Question 9

Lamoid suture

Answer 9

Arches across the poster surface of the skull, connects the occipital bone with the two parietal bones 

Question 10

Coronal suture

Answer 10

Attaches frontal to the parietal bone

Question 11

Saggital suture

Answer 11

Extend from the Lamoid suture to the coronal suture between the parietal bones

Question 12

Obirtal cavities

Answer 12

Lies in the upper half of the face
Formed by 7 bones
And 4 bones

Question 13

7 bones that form the orbital cavities

Answer 13

Frontal
Sphenoid
Maxillary
Ethmoid
Lachrymal
Zygomatic
Palatine

Question 14

4 walls that form the orbital

Answer 14

Roof (frontal and the sphenoid )
Lateral ( zygomatic, sphenoid)
Medial ( maxilla, lacrimal, ethmoid)
Floor( maxilla, zygomatic)

Question 15

nasal cavities : location

Answer 15

Between the orbits and divided into the right and left cavities by the nasal septum

Question 16

Structure of the nasal cavities

Answer 16

Lateral wall : curved bone called conchae
Medial wall: formed by the nasal septum
Roof: narrow, contains smell receptors
Floor: wide, separates nose from the mouth

Question 17

Lateral wall of nasal cavities

Answer 17

Maxilla
Lacrimal
Ethmoid
Inferior nasal conchae

Question 18

Medial wall of the nasal cavities

Answer 18

Perpendicular platter of the ethmoid
Vomer

Question 19

Roof of the nasal cavities

Answer 19

Nasal bone
Frontal bone
Ethmoid
Sphenoid

Question 20

Floor of the nasal cavities

Answer 20

Palatine
Bone
Maxilla

Question 21

Paranasal sinuses:

Answer 21

Air filled mucous lined spaces within skull bones that are continuous with nasal cavities

Question 22

Location of the paranasal sinuses

Answer 22

At the sphenoid, ethmoid, frontal bone and paired palatine bones and maxilla

Question 23

Functions of the paranasal bone

Answer 23

Make skull lighter
Enhance voice resonance

Question 24

Maxilla sinuses

Answer 24

Largest and lowest sinus
Clinically important because it’s drainage lies superior near the roof

Question 25

Frontanelles

Answer 25

Newborns cranial bones are separated by large Membranous and Unassified gap

Question 26

4 large frontanellous

Answer 26

Anterior
posterior
anterolateral
posterior-lateral

Question 27

Functions of the frontanellous

Answer 27

Allows hear to deform as bones overlap during its passage through the birth canal

Rapid growth and expansion of the infants brain 

Question 28

Functions of the skull

Answer 28

Protects and stabilises position of the brain cranial nerves and blood vessels

How to surface provides a large area attachment for muscles

Provides framework and support