Mod3-Obj7: Neural pathways Flashcards
Sensory pathways
Relay sensory input from the receptor to the brain
-Conduct specific sensory input, to a specific brain destination at a specific conduction speed
Sensory pathways are multi-neuron pathways and usually involve
- ) A sensory neuron of the PNS
2. ) Two interneurons of the CNS
The Central Nervous System
Integration primarily occurs in the brain
Motor areas of the brain decide on and…
initiate a motor response
Sensory areas of the brain…
Receive, process and interpret incoming sensory input
The ability to consciously perceive a stimulus depends on sensory input reaching the…
Cerebral cortex of the brain
E.g.) Pain
- Perceive a stimulus
- Determine the intensity of a stimulus
- Identify the location of a stimulus
- Discriminate qualities of a stimulus
- Integrate various stimuli to identify all aspects of a sensation
- Communicate with the motor centres of the brain
Motor areas of the brain
Determine, generate and issue:
- Somatic motor output that results in controlled voluntary skeletal muscle movements
- Autonomic motor output that controls glands, cardiac and smooth muscles
Motor pathways
Relay motor output from motor centres in the brain to an effector muscle or gland
Motor pathways are multi-neuron pathways, involving:
- ) An interneuron of the CNS
2. ) One or two motor neurons of the PNS
Motor pathways include 3 basic motor pathways
- ) Somatic motor pathways
- ) Autonomic motor pathways
- ) Reflex arcs
Somatic motor pathways
Relay motor output from the primary motor cortex of the cerebrum to an effector skeletal muscle
-Control voluntary skeletal muscle movements
Autonomic motor pathways
Relay motor output from the hypothalamus to an effector gland, cardiac or smooth muscle
-Control involuntary cardiac and smooth muscle movements and glandular secretion
