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Normal CT brain

Surface marking

Motor cortex

Sensory cortex

Visual cortex

Gyri and sulci

Midline sagital section

Motor cortex

Sensory cortex

Visual cortex

Midline sagital section

Along the orbito-meatal line

1. Left globe

2. Ethmoid sinus

3. Sphenoid sinus

4. Petrous ridge

5. Mastoid air cells

6. Fourth ventricle

7. Internal occipital protuberance & upper limit of cisterna magna.

a) T-ant part of temporal lobe in middle fossa; P-Pons; C-Cerebellum

b) Blood supply - (MC) middle cerebral artery, (PC) posterior cerebral artery

c) Motor (pyramidal) & sensory tracts (medial lemniscus)

10 mm

1. Optic nerve

2. Orbital fat

3. Cribiform plate of ethmoid bone

4. Pituitary fossa

5. Dorsum sellae

6. Basilar artery

7. Pontine cistern

8. Temporal horn of lateral ventricle

9. Cerebellopontine angle

10. Vermis of cerebellum

a) T-temporal lobe; P-Pons; C-cerebellum

b) MCA, PCA

c) Motor & sensory tracts

20 mm

1. Frontal sinus

2. Gyri recti

3. Hypothalamus in chiasmatic cistern

4. 3rd ventricle - ant part

5. Sylvian fissure

6. Interpeduncular fossa

7. Quadrigeminal cistern

8. Cerebellar sulcus

9. Cisterna magna

a) F-frontal; T-Temporal; C-Cerebellum; M-Midbrain

b) ACA, MCA, PCA territories

c) Motor & sensory tracts in midbrain & motor cortex in frontal lobe

30 mm

1. Frontal horn of lateral ventricle

2. 3rd ventricle

3. Sylvian fissure

4. Quadrigeminal bodies & cistern

5. Choroid plexus in trigone of lateral ventricle

6. Superior cerebellar cistern

a) F-frontal; D-Diencephalon (Thalamus & basal nuclei); T-temporal lobe; C-Cerebellum

b) ACA, MCA, PCA, P=perforating arteries arise from the terminal internal carotid & proximal ant. & middle cerebral trunk

c) Motor, sensory & visual tract

40 mm

1. Falx cerebri

2. Interventricular septum (septum pallicidum)

3. Head of caudate nucleus

4. Sylvian fissure

5. Internal capsule

6. Thalamus

7. Calcified pineal gland

8. Occipital horn of lateral ventricle

9. Straight sinus in falx

a) F-Frontal; P-Parietal; T-Temporal; O-Occipital; D-Dienchephalon; C-Apex of posterior fossa

b) ACA, MCA, PSA, P

c) Motor, sensory, visual tract

50 mm

1. Body of Corpus callosum

2. Body of the lateral ventricle

3. Body of caudate nucleus

4. Corona radiata

5. Choroid plexus

6. Splenium of corpus callosum

7. Falx cerebri

a) F-Frontal; P-parietal; O-Occipital

b) ACA, MCA, PCA

c) Motor, sensory, visual tract

60 mm

1. Falx & interhemispheric fissure

2. Lateral ventricle

3. Parietal-occiptal sulcus

a) F-Frontal; P-parietal; O-Occipital

b) ACA, MCA, PCA

c) Motor, Sensory radiation

70 mm

1. Interhemispheric fissure & falx

2. Corona radiata

3. Precentral gyrus

4. Postcentral gyrus

5. Parietao-occipital sulcus

a) F-Frontal; P-Parietal; O-Occipital

b) ACA, MCA, PCA

c) Motor & sensory radiation

80 mm

1. Falx cerebri

2. Cingulate sulcus

a) F-Frontal; P-Parietal

b) ACA, MCA

c) Motor & Sensory radiation

90 mm

1. Superior frontal sulcus

2. Pre-central gyrus

3. Central sulcus (Rolandic fissure)

4. Post-central gyrus

a) F-Frontal; P-Parietal

b) ACA

c) Motor, sensory cortices

1. Brain

1. Temporal L

2. Cerebellum

3. Pons

2. Sinuses

1. Ethmoid

2. Sphenoid

3. Cisterns

1. Magna

4. Others

1. Orbits

2. Orbital nerve

3. Auditory meatus


1. Brain

1. Temporal L

2. Cerebellum

3. Pons

2. Sinuses

1. Frontal

2. Sphenoid

3. Ventricles/Cisterns

1. 4th Vent

4. Others

1. Orbits

2. Auditory meatus


1. Brain

1. Temporal L

2. Frontal L

3. Cerebellum

4. Pons

2. Sinuses

1. Sphenoid

2. Frontal


1. 4th Vent

4. Others

1. Orbital fat

2. EOM

1. Brain

1. Temporal L

2. Frontal L

3. Cerebellum

4. Pons

2. Sinuses

1. Sphenoid

2. Frontal


1. 4th Vent

2. C. magna

4. Others

1. Petrous ridge

1. Brain

1. Temporal L

2. Frontal L

3. Cerebellum

4. Pons

2. Sinuses

1. Sphenoid

2. Frontal


1. 4th Vent

2. Supracellar C

3. Circummesencephalon (ambient) C

4. Others

1. Dorsum sellae

1. Brain

1. Temporal L

2. Frontal L

3. Cerebellum

4. Pons

2. Fissure/gyri/sulci

1. Sylvian

2. Falx cerebri

3. Falx cerebelli


1. 4th Vent

2. Supracellar C

3. Ambient C

4. Others


1. Brain

1. Temporal L

2. Frontal L

3. Cerebellum

4. Midbrain


1. Sylvian

2. Falx cerebri

3. Falx cerebelli


1. 4th Vent

2. Quadrigeminal C

3. supracellar C

4. Others


1. Brain

1. Temporal L

2. Frontal L

3. Cerebellum

4. Midbrain


1. Sylvian

2. Falx cerebri

3. Falx cerebelli


1. 3rd Vent

2. Quadrigeminal C

3. Supracellar C

4. Others

1. Brain

1. Temporal L

2. Parietal L

3. Frontal L

4. Cerebellum

5. Midbrain


1. Sylvian F

2. Falx cerebri

3. Falx cerebelli


1. 3rd Vent

2. Quadrigeminal C

3. Superior cerebellar C

4. Others

1. Brain

1. Temporal L

2. Parietal L

3. Frontal L

4. Occipital L

5. Septum pallucidum

6. Caudate nucleus (caput)

7. Putamen

8. Globus pallidus

9. Thalamus

10. Internal capsule


1. Sylvian F

2. Falx cerebri

3. Falx cerebelli


1. Lateral Vent - frontal horn

2. 3rd Vent

3. Quadrigeminal C

1. Brain

1. Temporal L

2. Parietal L

3. Frontal L

4. Occipital


6. Caudate nucleus (caput)

7. Putamen

8. Globus pallidus

9. Thalamus

10. Internal capsule


1. Sylvian F

2. Falx cerebri


1. Lateral Vent

1. Frontal horn

2. Occipital horn

2. 3rd Vent

3. Quadrigeminal C

4. Pineal gland

1. Brain

1. Temporal L

2. Parietal L

3. Frontal L

4. Occipital


6. Caudate nucleus (body)

7. Thalamus

8. Corona radiata

9. Corpus callosum

1. Body

2. Splenium


1. Central sulcus

2. Falx cerebri


1. Lateral Vent (body)

2. Choroid plexus

1. Brain

1. Parietal L

2. Frontal L

3. Occipital

4. Corona radiata


1. Falx cerebri

2. Central sulcus


1. Lateral Vent

1. Brain

1. Parietal L

2. Frontal L

3. Occipital

4. Corona radiata


1. Falx cerebri

2. Central sulcus

3. Parieto-occipital fissure

1. Brain

1. Parietal L

2. Frontal L

3. Corona radiata


1. Falx cerebri

2. Central sulcus

3. Parieto-occipital fissure

1. Brain

1. Parietal L

2. Frontal L


1. Falx cerebri

2. Central sulcus

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