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Nervous System
| Term | Definition |
|---|---|
| Main Regions of the brain | Cerebrum, diencephalon, cerebellum and brain stem |
| Cerebrum | top, biggest part, thinking |
| Cerebral Hemispheres | left and right halves of the brain |
| Corpus Callosum | Fibers connecting both halves of the brain, c shaped structure |
| Fornix | fiber tract linking limbic system regions |
| Longitudinal Fissure | big divide of cerebral hemispheres |
| Gyrus | raised bumpy grooves of cerebrum |
| Sulcus | lower pit of cerebrum |
| Diencephalon | made up of epithalamus, thalamus and hypothalamus |
| Thalamus | bilateral egg shaped nuclei connected by interthalamic adhesion and forming superior wall of 3rd ventricle. relay station for info coming from cortex. |
| Hypothalamus | forms floor of 3rd ventricle , cap over brainstem and 3rd ventricle. Visceral control center |
| Pineal Gland | a pea-sized conical mass of tissue behind the third ventricle of the brain, secreting a hormone like substance in some mammals. |
| Pituitary Gland | the major endocrine gland. A pea-sized body attached to the base of the brain, the pituitary is important in controlling growth and development and the functioning of the other endocrine glands. |
| Cerebellum | "little brain" attach to the top of the brain stem. Components include vermis, arbor vitae, cortex, peduncles |
| Brain Stem | Continuation of spinal cord. Contains medulla oblongata, pons and midbrain |
| Midbrain | a small central part of the brainstem, developing from the middle of the primitive or embryonic brain. |
| Pons | bulging brain stem region between midbrain and medulla. |
| Medulla Oblongata | most inferior part of brain stem, eventually becomes spinal cord. Autonomic reflex center. |
| Cranial Nerve 1 or olfactory bulb | neural structure of the vertebrate forebrain involved in olfaction, or the sense of smell. Flow of olfactory information from receptors to glomeruli layer |
| Cranial Nerve 2 or optic nerve | each of the second pair of cranial nerves, transmitting impulses to the brain from the retina at the back of the eye. |
| Optic Chiasma | the X-shaped structure formed at the point below the brain where the two optic nerves cross over each other |
| lateral ventricle | 2 lateral ventricles. one in each cerebral hemisphere. |
| third ventricle | formed from diencephalon. Superior to hypothalamus; lies between right/left halves of thalamus |
| fourth ventricle | runs through brain stem (midbrain) and becomes the central canal of the spinal cord. |
| spinal cord | attaches to the brain via brain stem. extends to lumbar vertebra. Housed in vertebral column, CSF runs through central canal. |
| meninges | dura, arachnoid and pia mater |