BI13_Ch12 PP Outline

BI13_Ch12 PP Outline - 1 2 The Central Nervous System...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 The Central Nervous System Chapter 12 2 Topics Structure and Function of the Brain Functional Brain Systems Protection of the brain Structure and function of the spinal cord 3 Structure and Function of the Brain Overview Cerebral Hemispheres Diencephalon Brain stem Cerebellum 4 The Brain Control center of the body Composed of very soft tissue Weighs about 3 lbs Four main regions Cerebral hemispheres Diencephalon Brain stem Cerebellum 5 Simpli±ed Structure of The CNS Central cavity Grey matter core White external white matter In the brain Additional layer of grey matter 6 Ventricles: Holes in Your Head Continuous ²uid ±lled cavities at the center of the CNS Filled with cerebrospinal ²uid (CSF) The lateral ventricles In the cerebral hemispheres Third ventricle In the diencephalon The fourth ventricle In the brainstem Continuous with central canal of spinal cord 7 Structure and Function of the Brain Overview Cerebral Hemispheres Diencephalon Brain stem
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Cerebellum 8 Overview of Cerebral Hemispheres Outer superior part of the brain 83% of total brain Two equivalent sides Right and left hemispheres 9 Structures of Cerebral Hemispheres Cerebral cortex Outer most layer of grey matter Information processing Cerebral white matter Axons Communication between hemispheres Basal nuclei Regulate cortex 10 Folding Increases Cortex Surface Area Gyrus Elevated ridge of tissue Sulcus Shallow groove Divide hemispheres into lobes Fissure Deeper groove Separates large regions of the brain 11 Five Lobes Separated By Sulci Super±cial lobes Frontal Parietal Temporal Occipital Deep lobe Insula The central sulcus Separates the frontal lobe from the parietal lobe The lateral sulcus Outlines the temporal lobe 12 Cerebral Hemispheres Cerebral Cortex Cerebral White Matter Basal Nuclei 13 Cerebral Cortex: Outermost Layer Mostly gray matter Contains our consciousness and personality
Background image of page 2
Contains billions of interneurons Contains our consciousness and personality Controls many of our voluntary responses 14 Functional Areas of Cerebral Cortex Neurons that work together are often located together Mapping of function is an approximation Maps are oversimpli±ed 15 Functional Areas of Cerebral Cortex Three major types of functional areas All are for processing not input or output Motor areas (Red) Sensory areas (Blue) Association areas (Light colors) 16 Control of Cerebral Cortex Functions Contralateral control Each hemisphere controls functions of the opposite side of the body Common Ipsilateral control Hemisphere controls functions on same side of body Rare 17 Lateralization: Left and Right Hemispheres Specialize Hemispheres are roughly equivalent There is some lateralization of function In most right handed people Left side controls language, math, and logic, Right side is visual, artistic, and creative 18 Primary Motor Cortex Location Posterior portion of the frontal lobe anterior to the central sulcus Contains pyramidal cells Large neurons that allow us to control skeletal muscle movements
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 13

BI13_Ch12 PP Outline - 1 2 The Central Nervous System...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online