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| part of the CNS found within the spinal column and communicates with the sense organs and muscles below the level of the head |
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| the entering dorsal roots carry sensory information and the exiting ventral roots carry motor information |
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| The cell bodies of the sensory neurons are located in clusters of neurons outside the spinal cord• Dorsal root ganglia |
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| located in the center of the spinal cord and is densely packed with cell bodies and dendrites |
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| composed mostly of myelinated axons that carries information from the gray matter to the brain or other areas of the spinal cord |
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| Peripheral nervous system |
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Definition
• Somatic Nervous System
• Autonomic Nervous System |
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sensory information
Transmit messages for motor movement |
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| • Autonomic Nervous System |
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| • sends and receives messages to regulate the automatic behaviors of the body (heart rate, blood pressure, respiration, digestion, etc) |
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• Autonomic Nervous System
subsystems |
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Definition
o The Sympathetic Nervous System.
o The Parasympathetic Nervous System |
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| o The Sympathetic Nervous System |
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Definition
| Prepares for rigourous activity |
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| The Parasympathetic Nervous System |
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Definition
| facilitates vegetative, nonemergency responses |
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| allow the medulla to control sensations from the head, muscle movements in the head |
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| works in conjunction to increase arousal and readiness of other parts of the brain |
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| o The reticular formation: |
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Definition
descending-control the motor areas of the spinal cord
o ascending portion sends output to much of the cerebral cortex, selectively increasing arousal and attention |
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Definition
• helps regulate motor movement, balance and coordination
• is also important for shifting attention between auditory and visual stimuli |
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| Hindbrain structures, the midbrain and other central structures of the brain combine and make this |
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Tectum-roof
Superior colliculus & inferior colliculus-sensory info
Tegmentum- contains nuclei 4 cranial nerves
Substantia nigra - facilitates readiness for movement |
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| the most anterior and prominent part of the mammalian brain and consists of two cerebral hemispheres |
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| Outer portion of the forebrain |
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| relay station from the sensory organs and main source of input to the cortex. |
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| important for certain aspects of movement |
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Definition
olfactory bulb, hypothalamus, hippocampus, amygdala, and cingulate gyrus of the cerebral cortex
associated with motivation, emotion, drives and aggression |
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Definition
Conveys messages to the pituitary gland to alter the release of hormones.
behaviors such as eating, drinking, sexual behavior and other motivated behaviors |
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Definition
| hormone producing gland found at the base of the hypothalamus. |
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Definition
comprised of the caudate nucleus, the putamen, and the globus pallidus.
Associated with planning of motor movement, and aspects of memory and emotional expression |
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