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Unformatted text preview: related Area of skin innervated by dorsal roots of 1 spinal segmant is called a dermatome 1:1 relationship between dermatomes & spinal segments (forms stripes when mapped on body) Dermatomal map used clinically to determine & identify spinal segment damage (sensory loss) Functional organisation of nervous system Function is mapped in the brain Somatosensory homunculus Motor homunculus Brodmann areas Efferent subdivision of Peripheral Nervous System Somatic nervous system o Axon fibres carried by 31 pairs of spinal nerves, each arising from a single segment o Also 12 pairs of cranial nerves which enter the brain Autonomic nervous system o Axon fibres carried by thoracic, lumbar & sacral nerves o Also 4 pairs of cranial nerves...
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