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23 Cards in this Set
- Front
- Back
Afferent pathway |
Ascending (from periphery to brain) |
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Efferent pathway |
Exiting brain( the response or reaction from the brain involving muscles and glands) |
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CNS |
Consists of brain and spinal cord . Fxn is to absorb info and interpret and then decide on the desired action. 12 paris cranial nerves & 31 pairs of spinal nerves. |
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PNS |
Consists of many receptors . Is a two way transport system involving efferent and afferent . Involves spinal and cranial nerves . |
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Somatic vs autonomic |
Somatic = voluntary Autonomic = involuntary & splits into para and sympathetic |
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Brain stem |
Located b/t brain and spinal cord . Controls basic functions like breathing sleep and BP. has midbrain ( role in vision hearing, head movement and the fright reflex) Has medulla oblongata ( respiration, heart rate, blood vessel D , sensations of touch and a role in swallowing breathing and hiccups) Has pons for respiration |
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Cerebellum |
Located at base and back of brain responsible for coordination and balance . |
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Diencephalon |
Contains hypothalamus and Thalamus which regulates temp, water bal, hunger , sex drive has pineal gland (which Secreted melatonin sleep) |
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Cerebrum |
Mass of brain |
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Frontal lobe |
Problem solving judgement and motor fxn |
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Parietal lobe |
Forms centre of cerebrum , manages sensation handwriting and body pos. |
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Temporal lobe |
Lateral and inferior to parietal . Involved in memory and hearing. |
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Occipital |
Posterior of cerebrum superior to cerebellum contains the brains visual processing system . |
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Protection for CNS |
Skull protects brain. Vertebrae the spinal cord. Protective tissue membrane called meninges (protects brain and spinal cord) meninges consist of dura arachnid and pia mater . |
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Dura mater |
Strong thick fibrous and contains 2 layers |
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Sub arachnoid and pia mater |
The arachnoid mater lines the inner side if the dura mater. A space is found between the pia and arachnoid mater which contains CSF |
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Cerebrospinal fluid |
Cushions brain and spinal cord. Consists of mostly water and few WBC, few proteins and no RBC. Anything that impacts on the movement of CSF Inc chance of brain damage . |
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Blood brain barrier |
Blood brain barrier protects the brain against pathogenic injury . It's the low permeability of the capillaries in the brain that is referred to as the blood brain barrier . |
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Neuron structure |
Dendrities = receive info Cell body (soma) = integrates info Axon/ Terminals transmits info to another neuron or effector organ . |
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Neuroglia/glia |
Non- neuronal cells that maintain homeostasis, form myelin , provide support and protection for for neurons in the C& PNS |
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Nervous tissue organisation in CNS |
Grey matter has cell bodies and dendrities White matter has axons bundled together called tracts |
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Cerebellum |
Coordination Balance |
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Diecephalon |
Hypothalamus Integrates messages to brains other ares |