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Anatomy Brain


What are the 4 regions of the brain? 1. Cerebral hemisphere 2. Diencephalon 3. Brain stem: midbrain, pons, and medulla oblongata 4. Cerebellum
What are the functions of the brain stem? 1. Produce automatic behaviors 2. necessary for survival 3. passageway for fiber tracts between cerebrum and spinal cord 4. heavily involved in innervation of face and head 5. 10 of 12 cranial N. (- 1&2)
What are the functions of the Cerebellum? 1. Smooths and coordinates body movements 2. Helps maintain equilibrium
Describe fissure and fissure of brain 1. Fissures: deep grooves – separate major regions of the brain 2. Transverse fissure: separates cerebrum and cerebellum 3. Longitudinal fissure: separates cerebral hemispheres
What is a sulcus? grooves on the surface of the cerebral hemispheres
What is a gyrus? twisted ridges between sulci
What are the sulcuses of the brain? Central sulcus separates frontal and parietal lobes Bordered by Precentral gyrus and Postcentral gyrus Parieto-occipital sulcus: Separates the occipital from the parietal lobe Lateral sulcus: Separates temporal lobe from parietal and frontal lobes
What is the cerebral cortex and its function? 1. Home of our conscious mind 2. Enables us to be aware of ourselves and our sensations 3. Initiate and control voluntary movements, communicate, remember, and understand
How many areas is the cerebral cortex divided into? 52 structurally distinct areas- Brodmann areas
Describe the primary motor cortex 1. Controls motor functions 2. somatic motor area 3. Located in precentral gyrus (Brodmann area 4) 4. Pyramidal cells: large neurons of primary motor cortex
What is contralateral? pyramidal axons cross over to opposite side of the brain
What are Basal nuclei? Are grey areas in the white matter of the brain and contain neurons: Caudate nucleus, Lentiform nucleus, Amygdala,
What is the functions of Basal nuclei? 1. Cooperate with the cerebral cortex in controlling movements 2. Receive input from many cortical areas 3. Evidence shows that they: start, stop, and regulate intensity of voluntary movements In some way estimate the passage of time
Where is the corpus striatum? Is situated lateral to the thalamus, is divided by a band of nerve fibers, called the internal capsule, into the caudate nucleus and the lentiform nucleus.
What is the lentiform nucleus composed of? Globus pallidus and Putamen.
What are the ventricles of the brain? 1. Expansions of the brain’s central cavity 2. Filled with CSF
What are the 4 ventricles of the brain? 1. Lateral ventricles: located in cerebral hemispheres 2. Third ventricle: lies in diencephalon Connected with lateral ventricles by interventricular foramen of Monro.
What are the 4 ventricles of the brain? (continue) 3. Fourth ventricle: lies in hindbrain, Connects to the central canal of the spinal cord 4.Cerebral aqueduct of Sylvius: connects 3rd and 4th ventricles
What is mnemonic for cranial nerves? S= Sensory M= Motor B= Both Some Say Marry Money, But My Brother Says Big Breasts Matter Most
Created by: xchengster