The Brain Ch. 7c The Brain Functional Anatomy

The Brain Ch. 7c The Brain  Functional Anatomy

The Brain Ch. 7c The Brain Functional Anatomy Cerebral Hemispheres Diencephalon

Brain Stem Cerebellum Cerebral Hemispheres Anatomy Most superior part of the brain Fissures separate parts of the Cerebrum

2 hemispheres (left and right) 4 lobes each

Frontal Lobe Parietal Lobe Occipital Lobe Temporal Lobe Cerebral Hemispheres Physiology

Frontal Lobe Language comprehension Voluntary movement Parietal Lobe Somatic Sensory Area

Occipital Lobe Visual Temporal Lobe Auditory (hearing) Olfactory (Smell)

Cerebral Hemispheres Brocas Area Junction of temporal, parietal & occipital lobes Speech area Cerebral Hemispheres

Sensory and Motor functions Perception and control are crossed Left Brain senses and controls right side of body Right Brain senses and controls left side of body

Diencephalon Diencephalon (interbrain) Thalamus Hypothalamus Regulates body temperature, water balance, metabolism Regulates emotions such as appetite, sex,

pain, pleasure Pituitary Gland Brain Stem Midbrain Sends messages into and out of the brain

Vision and Hearing reflexes Pons Breathing Control Medulla oblongata Control: heart rate, blood pressure,

breathing, swallowing, vomiting, etc. Reticular formation Controls Asleep/Awake Cerebellum Inferior and Dorsal to the Occipital Lobe

Functions: Timing for Skeletal muscle activity Balance Equilibrium Monitors body position Protection of Central Nervous

System Meninges Cerebrospinal Fluid Blood-Brain Barrier Meninges 3 layers of connective tissue protecting

CNS Dura Mater Means tough or hard mother Outer most layer - thick and tough Arachnoid Mater Means spider mother

Middle layer - web-like Pia Mater Means gentle mother Innermost layer Cerebrospinal fluid

Watery broth, like blood plasma Forms watery cushion around brain and spinal cord Protection from injury and trauma Is made from filtered blood Circulates and renews at a constant

rate Blood-Brain Barrier Least permeable capillaries feed nervous system Prevents serious chemical imbalances Prevents disease from passing into CNS

Some substances still easily pass into brain Alcohol Nicotine Anesthetics Brain Dysfunctions Concussion

Slight injury: dizzy, briefly lose consciousness Contusion Brain tissue destruction: coma Progression of brain injury/healing Cerebral Edema

Brain Swelling Cerebrovascular Accident Blood circulation to brain is stopped: clot, ruptured blood vessel. Brain tissue dies

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