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CT OF THE HEAD. SKULL AND FACIAL BONES ANATOMY. CRANIAL BONES AND SUTURES The bones of the skull are joined together by joints OR articulations called SUTURES. CRANIAL BONES 3-D. F. V. P. O. T. CRANIAL BONES 3-D. P. F. FRONTAL BONE. F. FRONTAL BONE. F. PARIETAL BONE. P.

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CT OF THE HEAD

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CT OF THE HEAD


SKULL AND FACIAL BONES ANATOMY


CRANIAL BONES AND SUTURES

The bones of the skull are joined together by joints OR articulations called SUTURES


CRANIAL BONES 3-D

F

V

P

O

T


CRANIAL BONES 3-D

P

F


FRONTAL BONE

F


FRONTAL BONE

F


PARIETAL BONE

P


OCCIPITAL BONE

O

F.M.


O.C.

F.M.


M.A.C.

T. BONE


ANATOMICAL FEATURES:1. External auditory canal 2. Auditory (eustachian) tube 3. Mastoid air cells 4. Cochlea 5. Internal auditory canal 6. Incus 7. Malleus 8. Vestibule 9. Semicircular canal 10. Foramen ovale 11. Foramen spinosum 12. Carotid canal 13. Jugular foramen


ANATOMICAL FEATURES:1. External auditory canal 2. Vestibule 3. Cochlea 4. Stapes 5. Incus 6. Malleus 7. Semicircular canals 8. Internal auditory canal 9. Epitympanic recess


PAL.

M.S.

P.P.


SPHENOID BONE

S.S.


G.W.S.

S.S.

P.P.

P.H.


ETHMOID BONE

C.G.


ETHMOID BONE

E


MAXILLA & ZYGOMA

Z


C.G.

E

Z.

M.S.

M.

AL.

H.P.


MANDIBLE

C.

C.P.

R.

B.


TMJ

T.M.J.

CON.

M.R.


TMJ

T.M.J.

CON.

M.A.C.


EYE


ORBIT


S.R.M.

M.R.M.

L.R.M.

O.N.

I.R.M.


CRANIAL NERVES


  • I - Olfactory

  • II - Optic

  • III - Oculomotor

  • IV - Trochlear

  • V - Trigeminal

  • VI - Abducens

  • VII - Facial

  • VIII - Auditory

  • IX - Glossopharyngeal

  • X - Vagus

  • XI - Accessory

  • XII - Hypoglassal


I. Olfactory:

Sensory

nerves for smell


II. Optic:

Sensory

nerve for vision.


III. Oculomotor:

 control of extrinsic eye muscles and pupil dilation.


IV. Trochlear:

control of muscles that surround the eye


V. Trigeminal:

control of facial nerves and muscles for chewing.


VI. Abducens:

muscle control of lateral movement of the eyeball


VII. Facial:

control over facial expression and taste


VIII. Vestibulocochlear or Auditory Nerve:

Sensory

nerve for hearing


BRAIN IS SURROUNDED AND PROTECTED BYMENINGES


MENINGES

  • DURA MATTER – TOUGHEST, BETWEEN IT ARE MENINGEAL ARTERIES AND DURAL SINUSES.

  • ARACHNOID – DELICATE TRANSPARENT, SEPARATED FROM DURA M. BY SUBDURAL SPACE.

  • PIA MATTER – HIGHLY VASCULAR, ADHERES TO THE CONTOURS OF BRAIN. SUBARACHNOID SPACE SEPARATES PIA M. FROM ARACHNOID S.


DURAL FOLDS

  • FALX CEREBRI – SEPARATES TWO HEMISPHERES

  • TENTROIUM CEREBELLI - SEPARATES THE CEREBRUM AND CEREBELLUM


F.C.


TEN


VENTRICLES

  • PATHWAY FOR CIRCULATION OF CSF


VENTRICLES COMMUNICATION

  • LATERAL VENTRICLES - L & R- SEPTUM PELLUCIDUM

  • LATERAL AND III – FORAMEN OF MONROE

  • III AND IV – AQUEDUCT OF SYLVIUS


LATERAL VENTRICLES

L.V.


T. C.

IV V.


L.V.

III V.

L.V. O. HORN

CHOROID PLEXUS


L.V.

S.F.

III.V.

L.V.


CEREBRUM

  • CONSISTS OF W. MATTER AND G. MATTER.

  • C. CORTEX – OUTERMOST PORTION OF CEREBRUM.

  • CORPUS COLLOSUM – WHITE MATTER BUNDLE CONNECTS R & L CEREBRAL HEMISPHERES.


BASAL GANGLIA

  • CAUDATE NUCLEUS

  • LENTIFORM NUCLEUS

  • CLAUSTRUM

  • THALAMUS


L.V.

FX.

C. N. H.

LN.

INC.

TH.


BRAIN STEM

  • MIDBRAIN

  • PONS

  • MEDULLA


PONS

IV V.


MEDULLA


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