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Sectional Anatomy of the Brain Dr. G.R. Leichnetz

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. Septum pellucidum. Corpus callosum. Anterior horn, Lateral ventricle. Lateral sulcus.

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Sectional Anatomy of the Brain Dr. G.R. Leichnetz

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  1. Sectional Anatomy of the Brain Dr. G.R. Leichnetz

  2. Coronal Sections

  3. Coronal Section: Head of Caudate Superior frontal gyrus Middle frontal gyrus Cingulate gyrus Inferior frontal gyrus Septum pellucidum Corpus callosum Anterior horn, Lateral ventricle Lateral sulcus Insular cortex Anterior limb, internal capsule Head of caudate nucleus Rostrum, corpus callosum

  4. 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)

  5. MRI Coronal Section: Striatum T2 Superior frontal gyrus Middle frontal gyrus Ant. limb, int. capsule Inferior frontal gyrus Caudate nucleus Putamen Caudate nucleus Putamen

  6. 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

  7. Coronal Section: Optic Chiasm Closeup Extreme capsule Fornix Caudate Interventricular foramen of Monro connects lateral ventricle to third ventricle External capsule Internal capsule Choroid plexus Putamen 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

  8. MRI Coronal Section: Optic Chiasm T2 Caudate nucleus Putamen Globus pallidus Amygdala Optic chiasm

  9. 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

  10. Coronal Section: Thalamus/ Amygdala Closeup Caudate Fornix Posterior limb, internal capsule Interventricular foramen Thalamus Putamen Globus pallidus Third ventricle External segment Fornix Internal segment Hypothalamus Claustrum Amygdala Optic tract Optic nerve Optic chiasm

  11. Caudate nucleus Putamen & Globus pallidus Third ventricle Amygdala

  12. Coronal Section: Subthalamus/ Mammillary Bodies Fornix Thalamus Third ventricle Subthalamus Hippocampus Mammillary Bodies (hypothalamus) Uncus Parahippocampal gyrus

  13. 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

  14. Coronal Section: Subthalamus/ Hippocampus Posterior limb, internal capsule Putamen & Globus pallidus Subthalamus Thalamus Hippocampus Superior transverse temporal gyri III Temporal horn, lateral ventricle Parahippocampal gyrus

  15. Coronal Section: Subthalamus Closeup Caudate nucleus Fornix Globus pallidus Post. limb, internal capsule Third ventricle Thalamus Putamen Subthalamic nucleus Optic tract Fimbria of fornix (origin from hippocampus) Hippocampus Oculomotor nerves (III) exit from interpeduncular fossa

  16. Coronal Section: Pulvinar/ Rostral Midbrain Caudalmost third ventricle into cerebral aqueduct Pulvinar of thalamus Lateral geniculate nucleus Substantia nigra Crus cerebri Hippocampus Oculomotor nerves (III) exit interpeduncular fossa Parahippocampal gyrus

  17. Coronal Section: Pulvinar/ Rostral Midbrain Closeup Cerebral aqueduct Fornix Crus cerebri Pulvinar Red nucleus Substantia nigra Temporal horn, lateral ventricle Lateral geniculate nucleus Hippocampus III Parahippocampal gyrus

  18. Coronal Section: Pulvinar/Midbrain Pineal gland Splenium of corpus callosum Cingulate gyrus Pulvinar Substantia nigra Lateral geniculate nucleus Cerebral aqueduct Hippocampus Red nucleus Interpeduncular fossa Small part of basilar pons

  19. Coronal Section: Midbrain II Splenium of corpus callosum The lateral ventricle extends into the temporal horn (trigone) Pulvinar, caudal end of thalamus 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 Basilar pons Parahippocampal gyrus

  20. Coronal Section: Midbrain II Closeup Trigone (body of lateral ventricle courses ventrally to join temporal horn) Medial geniculate body Pulvinar Splenium Crus of fornix Hippocampal commissure Fimbria of fornix Superior colliculus Cerebral aqueduct and periaqueductal gray Oculomotor nucleus Hippocampus Basilar pons Substantia nigra

  21. Superior colliculus Goss Cerebral aqueduct Rostral Midbrain Substantia nigra Crus cerebri(cerebral peduncle) Oculomotor nerve (III)

  22. Inferior colliculus Goss Cerebral aqueduct Trochlear nerve (IV) Decussation of superior cerebellar peduncle Caudal Midbrain Basilar pons

  23. Anterior medullary velum Rostral 4th ventricle Goss Superior cerebellar peduncle Pontine tegmentum Rostral Pons Locus ceruleus Basilar pons

  24. Superior cerebellar peduncle Goss Vermis Caudal Pons Fourth ventricle Facial colliculus Pontine tegmentum Basilar pons Middle cerebellar peduncle

  25. Rostral Medulla Deep Cerebellar Nuclei Goss

  26. Cross Sections: Rostral Medulla Vermis Deep cerebellar nuclei Choroid plexus in 4th ventricle Inferior cerebellar peduncle Lateral recess of 4th ventricle Middle cerebellar peduncle Foramen of Luschka Inferior olivary nucleus Glossopharyngeal (IX) and vagus (X) nerves exit postolivary sulcus CN IX & X Flocculus Corticospinal tract in medullary pyramid Vestibulocochlear nerve (VIII)

  27. Fasciculus graciclis Fasciculus cuneatus Goss Nucleus gracilis Caudal Medulla Nucleus cuneatus Spinal nucleus V Pyramidal tract

  28. 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.

  29. Horizontal Section: Internal Capsule Third ventricle Putamen Globus pallidus Cuneus and lingual gyri Posterior commissure, pineal gland Anterior limb, internal capsule Genu, internal capsule Thalamus Genu, corpus callosum Caudate nucleus Posterior horn, lateral ventricle Septum pellucidum separates lateral ventricles Optic radiations Posterior limb, internal capsule Fornix and interventricular foramen

  30. 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

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