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Sectional Anatomy
of the Brain
Dr. G.R. Leichnetz
Coronal Sections
Coronal Section: Head of Caudate
Superior
frontal gyrus
Middle frontal
gyrus
Cingulate
gyrus
Inferior
frontal gyrus
Corpus callosum
Septum
pellucidum
Anterior horn,
Lateral ventricle
Lateral
sulcus
Insular
cortex
Anterior limb,
internal capsule
Head of caudate
nucleus
Rostrum,
corpus callosum
Coronal Section: Striatum
Superior
frontal gyrus
Middle frontal
gyrus
Cingulate
gyrus
Septum pellucidum
separating lateral
ventricles
Inferior
frontal gyrus
(Broca’s area)
Insular cortex
Putamen
Anterior limb,
internal capsule
Caudate
nucleus (head)
MRI Coronal Section: Striatum
T2
Middle
frontal
gyrus
Superior
frontal
gyrus
Ant. limb,
int. capsule
Inferior
frontal
gyrus
Caudate
nucleus
Putamen
Caudate
nucleus
Putamen
Coronal Section: Anterior Commissure/ Optic Chiasm
Fornix
Interventricular
foramen of Monro
Globus
pallidus
Fornix columns split
above anterior
commissure
Putamen
Claustrum
Lateral
sulcus
Superior
temporal
gyrus
Opening in
lamina terminalis
Optic
chiasm
Coronal Section: Optic Chiasm Closeup
Extreme
capsule
Fornix
Caudate
Interventricular foramen
of Monro connects lateral
ventricle to third ventricle
External
capsule
Internal
capsule
Putamen
Choroid
plexus
Globus
pallidus
Fornix
columns over
anterior
commissure
External
segment Internal
segment
AC
Basal forebrain
Claustrum
Hole in lamina terminalis
exposes front end of third
ventricle
Optic
chiasm
MRI Coronal Section: Optic Chiasm
T2
Caudate
nucleus
Putamen
Globus
pallidus
Amygdala
Optic
chiasm
Coronal Section: Thalamus/ Amygdala
Interventricular foramen of
Monro connects lateral
ventricle to third ventricle
Fornix
Globus
pallidus
Caudate (body)
Putamen
Posterior limb,
internal capsule
Insular
cortex
Thalamus
Superior
temporal
gyrus
Amygdala
Middle
temporal
gyrus
Hypothalamus
Optic
tract
Coronal Section: Thalamus/ Amygdala Closeup
Caudate
Fornix
Posterior limb,
internal capsule
Interventricular
foramen
Thalamus
Putamen
Globus
pallidus
Third
ventricle
External
segment Internal
segment
Fornix
Hypothalamus
Claustrum
Amygdala
Optic
nerve
Optic
chiasm
Optic
tract
Caudate nucleus
Putamen &
Globus pallidus
Amygdala
Third ventricle
Coronal Section: Subthalamus/ Mammillary Bodies
Fornix
Third
ventricle
Thalamus
Subthalamus
Hippocampus
Mammillary Bodies
(hypothalamus)
Uncus
Parahippocampal
gyrus
Coronal Section: Subthalamus/ Mammillary Bodies
Caudate
nucleus
Posterior limb,
internal capsule
Fornix
Putamen
Thalamus
Subthalamic
nucleus
Temporal horn of
lateral ventricle
Globus pallidus
Subthalamus
Optic
tract
Hippocampus
Mammillary
bodies
Uncus of
parahippocampal
gyrus
Coronal Section: Subthalamus/ Hippocampus
Posterior limb,
internal capsule
Putamen &
Globus pallidus
Subthalamus
Thalamus
Hippocampus
III
Parahippocampal
gyrus
Superior
transverse
temporal
gyri
Temporal horn,
lateral ventricle
Coronal Section: Subthalamus Closeup
Caudate
nucleus
Fornix
Post.
limb,
internal
capsule
Thalamus
Globus
pallidus
Third
ventricle
Putamen
Subthalamic
nucleus
Optic
tract
Fimbria of
fornix (origin
from
hippocampus)
Hippocampus
Oculomotor nerves
(III) exit from
interpeduncular fossa
Coronal Section: Pulvinar/ Rostral Midbrain
Caudalmost third
ventricle into
cerebral aqueduct
Pulvinar of
thalamus
Lateral
geniculate
nucleus
Substantia nigra
Crus cerebri
Hippocampus
Parahippocampal
gyrus
Oculomotor nerves (III)
exit interpeduncular fossa
Coronal Section: Pulvinar/ Rostral Midbrain Closeup
Cerebral aqueduct
Fornix
Substantia nigra
Crus cerebri
Pulvinar
Red
nucleus
Temporal horn,
lateral ventricle
Lateral
geniculate
nucleus
Hippocampus
III
Parahippocampal
gyrus
Coronal Section: Pulvinar/Midbrain
Pineal gland
Cingulate
gyrus
Splenium of
corpus callosum
Substantia nigra
Pulvinar
Lateral
geniculate
nucleus
Cerebral
aqueduct
Hippocampus
Red
nucleus
Small part of
basilar pons
Interpeduncular
fossa
Coronal Section: Midbrain II
The lateral ventricle
extends into the
temporal horn (trigone)
Pulvinar, caudal
end of thalamus
Splenium of
corpus callosum
Hippocampal commissure
(below splenium) connects
the two hippocampi
Fornix originates
from the
hippocampus
Optic radiations
(vertical sheet)
course caudally
in the wall of the
lateral ventricle
toward cuneus &
lingual gyri
Superior
colliculus
Parahippocampal
gyrus
Basilar pons
Coronal Section: Midbrain II Closeup
Trigone (body of
lateral ventricle
courses ventrally to
join temporal horn)
Crus of fornix
Fimbria
of fornix
Pulvinar
Medial
geniculate
body
Splenium
Hippocampal
commissure
Superior
colliculus
Cerebral aqueduct and
periaqueductal gray
Oculomotor
nucleus
Hippocampus
Basilar
pons
Substantia nigra
Superior colliculus
Goss
Cerebral aqueduct
Rostral Midbrain
Substantia nigra
Crus cerebri
(cerebral peduncle)
Oculomotor
nerve (III)
Inferior colliculus
Goss
Cerebral aqueduct
Trochlear
nerve (IV)
Decussation of
superior cerebellar
peduncle
Caudal Midbrain
Basilar pons
Anterior
medullary velum
Rostral 4th
ventricle
Goss
Superior cerebellar
peduncle
Rostral Pons
Pontine
tegmentum
Locus
ceruleus
Basilar pons
Goss
Caudal Pons
Vermis
Superior cerebellar
peduncle
Fourth ventricle
Facial colliculus
Pontine
tegmentum
Middle cerebellar
peduncle
Basilar
pons
Rostral Medulla
Deep Cerebellar
Nuclei
Goss
Cross Sections: Rostral Medulla
Deep cerebellar
nuclei
Vermis
Choroid plexus in
4th ventricle
Middle
cerebellar
peduncle
Flocculus
Inferior
cerebellar
peduncle
Lateral recess of 4th
ventricle
Foramen of
Luschka
Glossopharyngeal
(IX) and vagus (X)
nerves exit
postolivary sulcus
Inferior
olivary
nucleus
CN IX & X
Corticospinal tract
in medullary
pyramid
Vestibulocochlear
nerve (VIII)
Fasciculus
graciclis
Goss
Nucleus gracilis
Caudal Medulla
Nucleus cuneatus
Spinal nucleus V
Pyramidal tract
Fasciculus
cuneatus
MRI Horizontal Sections
The planes of
horizontal
MRI’s are
parallel to the
top of the head.
A section
through the
thalamus shows
all portions of
the internal
capsule.
Horizontal Section:
Internal Capsule
Putamen
Third ventricle
Globus
pallidus
Posterior
commissure,
pineal gland
Anterior limb,
internal capsule
Cuneus and
lingual gyri
Genu,
internal
capsule
Thalamus
Genu, corpus
callosum
Caudate nucleus
Posterior horn,
lateral ventricle
Septum pellucidum
separates lateral
ventricles
Fornix and
interventricular
foramen
Posterior limb,
internal capsule
Optic
radiations
MRI Horizontal Section
T2
Lentiform nucleus
(putamen &
globus pallidus)
Thalamus
Caudate nucleus
Genu, corpus
callosum
Splenium,
corpus
callosum
Ant. limb,
int. capsule
Genu, int.
capsule
Post. limb,
int. capsule