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The Human Brain. Central Nervous System Brain and Spinal Cord Brain and Spinal Cord Spinal Cord Brain.

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Presentation on theme: "The Human Brain. Central Nervous System Brain and Spinal Cord Brain and Spinal Cord Spinal Cord Brain."— Presentation transcript:

1 The Human Brain

2 Central Nervous System Brain and Spinal Cord Brain and Spinal Cord Spinal Cord Brain

3 Left & Right sides are separate Left & Right sides are separate Corpus Callosum : major pathway between hemispheres Corpus Callosum : major pathway between hemispheres Some functions are ‘lateralized’ Some functions are ‘lateralized’ language on left language on left math, music on right math, music on right Lateralization is never 100% Lateralization is never 100% Brain has 2 Hemispheres Left Hemisphere Corpus Callosum Right Hemisphere

4 Each hemisphere is divided into 4 lobes Frontal Parietal Occipital Temporal

5 Sensory Information sent to opposite hemisphere Principle is Contralateral Organization Principle is Contralateral Organization Sensory data crosses over in pathways leading to the cortex Sensory data crosses over in pathways leading to the cortex Visual Crossover Visual Crossover left visual field to right hemisphere left visual field to right hemisphere right field to left right field to left Other senses similar Other senses similar Left visual field Right visual field Optic nerves Corpus Callosum Left Visual Cortex Right Visual Cortex

6 Contralateral Motor Control Movements controled by motor area Movements controled by motor area Right hemisphere controls left side of body Right hemisphere controls left side of body Left hemisphere controls right side Left hemisphere controls right side Motor nerves cross sides in spinal cord Motor nerves cross sides in spinal cord Somatosensory CortexMotor Cortex

7 Corpus Callosum Major ( but not only) pathway between sides Major ( but not only) pathway between sides Connects comparable structures on each side Connects comparable structures on each side Permits data received on one side to be processed in both hemispheres Permits data received on one side to be processed in both hemispheres Aids motor coordination of left and right side Aids motor coordination of left and right side Corpus Callosum Medial surface of right hemisphere

8 Lobes of the Brain © Genentech Inc

9 Occipital Lobe Input from Optic nerve Input from Optic nerve Contains primary visual cortex Contains primary visual cortex most is on surface inside central fissure most is on surface inside central fissure Outputs to parietal and temporal lobes Outputs to parietal and temporal lobes Occipital Lobe Visual Lobe

10 Temporal Lobe Inputs are auditory, visual patterns Inputs are auditory, visual patterns speech recognition speech recognition face recognition face recognition word recognition word recognition memory formation memory formation Outputs to limbic System, basal Ganglia, and brainstem Outputs to limbic System, basal Ganglia, and brainstem z Contains primary auditory cortex Temporal Lobe Temporal Lobe Auditory Cortex

11 Parietal Lobe Somatosensory Cortex Parietal Lobe Inputs from multiple senses Inputs from multiple senses z contains primary somatosensory cortex z borders visual & auditory cortex z Outputs to Frontal lobe z hand-eye coordination z eye movements z attention

12 Frontal Lobe Frontal Lobe Contains primary motor cortex Contains primary motor cortex Motor Cortex Motor Cortex Broca’s Area Motor Cortex Working Memory No direct sensory input No direct sensory input Important planning and sequencing areas Important planning and sequencing areas  Broca’s area for speech Prefrontal area for working memory Prefrontal area for working memory

13 Layers of the Cerebrum © Genentech Inc

14 Control Centers of the Brain © Genentech Inc


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