Chapter 16 [11th edition] Study Guide

[note: you can delete the items in red I will not test you on those items]

 

referred pain

proprioceptive sensations

muscle spindles

tendon organs

joint kinesthetic receptors

primary somatosensory area

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

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

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

somatic motor pathways

lower motor neuron (LMN)

upper motor neuron (UMN)

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