Neuroanatomy Notes Pdf Portable Jun 2026

The nervous system is divided into two primary anatomical components:

Contains cell bodies, divided into dorsal (sensory) and ventral (motor) horns.

Lobes, sulci, gyri, and functional areas (frontal, parietal, temporal, occipital) neuroanatomy notes pdf

The PNS acts as the relay network, transmitting signals between the CNS and the peripheral tissues.

Nervous Tissue │ ├── Neurons (Signal transmission) └── Neuroglia (Supporting matrix) ├── CNS Glia (Astrocytes, Oligodendrocytes, Microglia, Ependymal cells) └── PNS Glia (Schwann cells, Satellite cells) Neurons: The Functional Units The nervous system is divided into two primary

CSF exits the fourth ventricle through the foramina of Luschka and Magendie to circulate around the brain and spinal cord, where it is eventually reabsorbed by arachnoid granulations into the dural venous sinuses. 6. High-Yield Cranial Nerves Summary Primary Function Clinical Sign of Damage CN I Anosmia (loss of smell) CN II Visual field deficits (e.g., anopsia) CN III Oculomotor Eye movement, pupil constriction Ptosis (drooping eyelid), dilated pupil CN IV Eye movement (Superior Oblique muscle) Vertical diplopia (double vision) CN V Trigeminal Facial sensation, mastication (chewing) Loss of facial sensation, weak jaw deviation CN VI Eye movement (Lateral Rectus muscle) Medial strabismus (inward-turning eye) CN VII Facial expression, taste (anterior 2/3) Bell's Palsy (facial paralysis) CN VIII Vestibulocochlear Hearing and balance Vertigo, sensorineural hearing loss CN IX Glossopharyngeal Taste (posterior 1/3), swallowing Loss of gag reflex CN X Parasympathetic innervation, vocal cords Uvula deviates away from side of lesion CN XI Shrugging shoulders (Sternocleidomastoid/Trapezius) Drooped shoulder, weakness turning head CN XII Hypoglossal Tongue movement Tongue deviates toward side of lesion 7. Strategic Tips for Studying Neuroanatomy

31 pairs of nerves exiting the spinal cord via intervertebral foramina. Functional Divisions: Functional Divisions: CSF is secreted by the choroid

CSF is secreted by the choroid plexus inside the lateral, third, and fourth ventricles. Lateral Ventricles →right arrow Flow through the Interventricular Foramina of Monro →right arrow Third Ventricle . Third Ventricle →right arrow Flow through the Cerebral Aqueduct of Sylvius →right arrow Fourth Ventricle . Fourth Ventricle →right arrow