Chapter 16 – Study Guide

 

referred pain

proprioceptive sensations

muscle spindles

tendon organs

joint kinesthetic receptors

primary somatosensory area (postcentral gyrus)

sensory signals from L body go to R cerebrum & vice versa

relative size of regions within primary somatosensory area

                are proportional to the number of sensory receptors / body part

primary motor area (precentral gyrus)

relative size of regions within primary motor area

                are proportional to the number of motor units / muscle in the body part

somatic sensory pathways

                first order neuron

                second order neuron

                third order neuron

somatic motor pathways

                upper motor neuron (UMN)

                lower motor neuron (LMN)

 

 

 

 

 

 

 

 

 

I WON’T ASK YOU ANYTHING ABOUT THE FOLLOWING SPECIFIC SENSORY OR MOTOR PATHWAYS

                posterior column

                                fine touch, stereognosis, conscious proprioception, kinesthesia, weight discrimination, vibration

                lateral spinothalamic

                                pain, thermal sensations

                anterior spinothalamic

                                tickle, itch, pressure, crude touch

                anterior & posterior spinocerebellar

                                proprioception

                lateral corticospinal

                from motor cortex to skeletal muscle – moves limbs, hands, feet

                anterior corticospinal

                from motor cortex to skeletal muscle – moves axial skeleton

                corticobulbar

                                from motor cortex to skeletal muscle – moves head, neck