Brain.

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Presentation transcript:

Brain

Major parts of brain Brain stem – continuous with spinal cord; controls heart rate, breathing, reflexes: vomiting, coughing, swallowing, hiccupping, sneezing, tracking, startling; includes: Midbrain Pons Medulla oblongata

2. cerebellum: regulates posture and balance.

3. thalamus – connects brainstem to cerebrum 4. hypothalamus –major regulator of homeostasis (monitor glucose levels, hunger/thirst, control of body temp, sleep patterns, drives/emotions)

5. cerebrum “seat of intelligence”; speech, memory, logical and emotional response, interpretation of sensation, voluntary movements Lobes: parietal, temporal, frontal, occipital

Protection of the brain 1. Cranium 2. Meninges: dura mater, arachnoid mater, pia mater

3. Blood-brain barrier (BBB) – tight junctions of brain capillary cells preventing permeability of many substances (lipid soluble substances – O2, CO2, alcohols can cross)

4. Cerebrospinal fluid (CSF): shock-absorbing medium and allows exchange of nutrients and waste products between the blood and nervous tissue

What are the parts of the brainstem? Medulla oblongata, pons, midbrain Diencephalon, pons, cerebellum Thalamus, hypothalamus, epithalamus Pineal body, pituitary gland, cerebral aqueduct

What is the overall function of the brainstem? Processing/interpreting information Timing of skeletal muscles/coordination Producing CSF Controlling vital signs

What is the order of meninges from CLOSEST to the brain to the skull (from deep to superficial)? Arachnoid mater, pia mater, dura mater Pia mater, arachnoid mater, dura mater Dura mater, arachnoid mater, pia mater Pia mater, dura mater, arachnoid mater

What is the overall function of the cerebrum? Processing/interpreting information Timing of skeletal muscles/coordination Producing CSF Controlling vital signs

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