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Gross Anatomy of the CNS S.J. Potashner

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1 Gross Anatomy of the CNS S.J. Potashner

2 The nervous system has distinct areas that are specialized for different (sub)functions. The distinct functional areas have different locations inside the nervous system, and they interact by signaling to one another along networks of cells. These components are organized into sub-systems (usually called ‘systems’) each of which performs specific functions. Many of these ‘systems’ span the length of the nervous system.

3 GOALS Learn some language of gross anatomy Learn the major subdivisions of the nervous system Recognize the cardinal features of each subdivision Learn the entry/exit points of the peripheral nerves

4 Anatomic Taxonomy

5 Frontal Coronal Median Sagittal Horizontal Axial Terms of Direction Medial Lateral Ipsilateral Contralateral Anterior, Rostral Posterior, Caudal Ventral Dorsal Superior, Rostral, Cranial Inferior, Caudal Anatomical Planes

6 Dorsal Ventral Rostral Caudal Rostral Caudal Superior Inferior Caudal Dorsal Ventral Terms of Direction

7 Spinal cord Cerebrum Human CNS Subdivisions

8 Cerebrum Spinal cord Cerebellum Medulla Pons Midbrain Thalamus Rat CNS Subdivisions Cerebrum

9 Surface Features: Lateral Cerebrum Caudal Longitudinal fissure Rostral Lateral fissure Central sulcus Preoccipital notch Frontallobe Temporallobe Occipitallobe Parietallobe Rostral Caudal

10 Surface Features: Medial Cerebrum Central sulcus Rostral Caudal Parieto-occipital sulcus Cingulate sulcusFrontallobe Parietallobe Occipitallobe Temporal lobe Caudal Rostral

11 Surface Features: Thalamus Dorsal thalamus Hypothalamic sulcus Hypothalamus Optic nerve

12 Surface Features: Midbrain Aqueduct Oculomotor nerve Cerebral peduncle Superior colliculus Inferior colliculus

13 Surface Features: Pons Pontine protuberance Cerebellum

14 Surface Features: Medulla

15 Surface Features: Ventral Brain Stem Med Pons Mi Th Cerebellum Frontallobe Temporallobe Lateral fissure Olfactory bulb Olfactory tract


17 Spinal levels Vertebral levels Spinal Cord

18 Surface Features: Spinal Cord

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