SENSORY RECEPTORS
Three categories of receptors that initiate impulses along somatic sensory pathways
What are exteroceptors (general and specific senses) and proprioceptors?
Sensory fibres of cranial nerve from receptor to brainstem
What is a first order neuron?
What is in cranial nerve ganglion?
The point of origin of the pathway
What is the cerebral cortex
Where axons in sensory pathways decussate
What is a second order neuron?
These somatic sensory receptors are located in muscles, tendons, inner ear and joints and provide info about body position, muscle length and tension, position and motion of joints, etc.
What are proprioceptors?
Sensory fibres of spinal nerve from receptor to spinal cord
What is a first order neuron?
Where cell bodies of first order neurons are located (spinal nerve)
What is dorsal root ganglion?
Neurons in a somatic motor pathway (names)
What are upper and lower motor neurons?
Where axons of motor pathways decussate
What is an upper motor neuron?
These receptors are sensitive to stimuli originating outside the external environment
What are exteroceptors?
Sensory tract from brainstem or spinal cord to the thalamus
What is a second order neuron?
Where cell bodies of second order neurons are located
What is grey matter?
Motor tract from area of initiation in brain to brainstem or spinal cord
What is an upper motor neuron?
Sites where decussation of axons occur (motor pathway)
What is medulla oblongata or spinal cord levels?
Receptors that monitor stimuli associated with pain, body position, and chemical composition of blood ... act slowly & continue to trigger nerve impulses if the stimulus persists
What is adaptation in sensory receptors?
Sensory tract from thalamus to cerebral cortex
What is a third order neuron?
Where cell bodies of third order neurons are located
What is the thalamus?
Motor fibres of cranial nerves from brainstem to effector
What is a lower motor neuron (cranial)?
Cerebral activities such as sleep and wakefulness, learning, memory, language
What are integrative functions?
The conscious or subconscious awareness of changes in the external or internal environment
The somatic sensory pathway results in ...
Motor fibres of spinal nerves from spinal cord to effector
What is a lower motor neuron (spinal)?
An unpleasant sensory and emotional experience with actual or potential tissue damage
What is pain?