Unformatted text preview: Chapter 3: Neuroanatomy
Anatomical subdivisions of the brain
III. Brain structures
I. I. Nomenclature
I. Neuraxis: an imaginary line drawn through the
Neuraxis: spinal cord up to the front of the brain.
spinal Dorsal: toward the top of the head and back. Ventral: toward the ground and stomach. Medial: toward the midline. Lateral: toward the side. Anterior (rostral): toward the front end. Posterior (caudal): toward the tail. Superior: above or dorsal to. Inferior: below or ventral to. Unilateral: on one side of the midline. Bilateral: on both sides of the midline. Ipsilateral: on the same side. Contralateral: on the opposite side. Three ways to slice the NS 1. Coronal (cross, frontal) section, transversely. 1. Sagittal section: perpendicular to the ground
and parallel to the neuraxis.
and 1. Horizontal section: parallel to the ground. Gray matter: collections of cell bodies. White matter: collections of axons covered
White with myelin sheath
with Nucleus (ganglion): a large number of cell
Nucleus bodies grouped together.
bodies Tract (nerve): a large number of axons
grouped together II.
II. Anatomical subdivision of the brain Major
Structure Telencephalon Cerebral cortex
Limbic system Third Diencephalon Thalamus
Pineal body Cerebral aqueduct Mesencephalon Tectum
Tegmentum Metencephalon Midbrain
(Mesencephalon) Subdivision Lateral
(Prosencephalon) Ventricle Cerebellum
Pons Myelencephalon Medulla oblongata Fourth III. Brain structures
III. 12 pairs of cranial nerves I. Olfactory: olfaction.
Oculomotor: eye muscles.
Trochlear: eye muscles
Trigeminal: sensory and motor to face
Abducens: eye muscles II.
VI. Facial: sensory and motor to face
Auditory (Vestibulocochlear): audtion,
III. Glossopharyngeal: sensory and motor to
throat and tongue
IV. Vagus: sensory and motor to viscera
Spinal accessory: neck muscles
VI. Hypoglossal: motor to tongue
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This note was uploaded on 05/25/2011 for the course PSYCHOLOGY 492 taught by Professor Xu during the Fall '10 term at Grand Valley State.
- Fall '10