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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

CT OF THE HEAD


Skull and facial bones anatomy

SKULL AND FACIAL BONES ANATOMY


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CRANIAL BONES AND SUTURES

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


Cranial bones 3 d

CRANIAL BONES 3-D

F

V

P

O

T


Cranial bones 3 d1

CRANIAL BONES 3-D

P

F


Frontal bone

FRONTAL BONE

F


Frontal bone1

FRONTAL BONE

F


Parietal bone

PARIETAL BONE

P


Occipital bone

OCCIPITAL BONE

O

F.M.


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O.C.

F.M.


T bone

M.A.C.

T. BONE


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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


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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


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PAL.

M.S.

P.P.


Sphenoid bone

SPHENOID BONE

S.S.


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G.W.S.

S.S.

P.P.

P.H.


Ethmoid bone

ETHMOID BONE

C.G.


Ethmoid bone1

ETHMOID BONE

E


Maxilla zygoma

MAXILLA & ZYGOMA

Z


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C.G.

E

Z.

M.S.

M.

AL.

H.P.


Mandible

MANDIBLE

C.

C.P.

R.

B.


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TMJ

T.M.J.

CON.

M.R.


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TMJ

T.M.J.

CON.

M.A.C.


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EYE


Orbit

ORBIT


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S.R.M.

M.R.M.

L.R.M.

O.N.

I.R.M.


Cranial nerves

CRANIAL NERVES


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  • I - Olfactory

  • II - Optic

  • III - Oculomotor

  • IV - Trochlear

  • V - Trigeminal

  • VI - Abducens

  • VII - Facial

  • VIII - Auditory

  • IX - Glossopharyngeal

  • X - Vagus

  • XI - Accessory

  • XII - Hypoglassal


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I. Olfactory:

Sensory

nerves for smell


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II. Optic:

Sensory

nerve for vision.


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III. Oculomotor:

 control of extrinsic eye muscles and pupil dilation.


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IV. Trochlear:

control of muscles that surround the eye


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V. Trigeminal:

control of facial nerves and muscles for chewing.


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VI. Abducens:

muscle control of lateral movement of the eyeball


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VII. Facial:

control over facial expression and taste


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VIII. Vestibulocochlear or Auditory Nerve:

Sensory

nerve for hearing


Brain is surrounded and protected by meninges

BRAIN IS SURROUNDED AND PROTECTED BYMENINGES


Meninges

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

DURAL FOLDS

  • FALX CEREBRI – SEPARATES TWO HEMISPHERES

  • TENTROIUM CEREBELLI - SEPARATES THE CEREBRUM AND CEREBELLUM


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F.C.


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TEN


Ventricles

VENTRICLES

  • PATHWAY FOR CIRCULATION OF CSF


Ventricles communication

VENTRICLES COMMUNICATION

  • LATERAL VENTRICLES - L & R- SEPTUM PELLUCIDUM

  • LATERAL AND III – FORAMEN OF MONROE

  • III AND IV – AQUEDUCT OF SYLVIUS


Lateral ventricles

LATERAL VENTRICLES

L.V.


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T. C.

IV V.


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L.V.

III V.

L.V. O. HORN

CHOROID PLEXUS


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L.V.

S.F.

III.V.

L.V.


Cerebrum

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

BASAL GANGLIA

  • CAUDATE NUCLEUS

  • LENTIFORM NUCLEUS

  • CLAUSTRUM

  • THALAMUS


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L.V.

FX.

C. N. H.

LN.

INC.

TH.


Brain stem

BRAIN STEM

  • MIDBRAIN

  • PONS

  • MEDULLA


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PONS

IV V.


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MEDULLA


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