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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 |