뒤로Peripheral Nervous System and Reflex Activity - Anatomy & Physiology
1:06
이 집합의 용어 (27)
The PNS consists of all neural structures outside the brain and spinal cord, including sensory receptors, peripheral nerves, ganglia, and motor endings.
A sensory system serving the body wall and limbs that receives inputs from receptors to provide sensation and perception.
Awareness of a stimulus that excites a receptor and generates an action potential to the cortex.
The interpretation of the meaning of a sensory stimulus by the brain.
Receptors that respond to touch, pressure, vibration, and stretch.
Receptors sensitive to changes in temperature.
Receptors that respond to light energy, such as those in the retina.
Receptors that respond to chemical stimuli like smell, taste, or changes in blood chemistry.
Receptors sensitive to pain-causing stimuli.
Receptors arising outside the body, detecting touch, pressure, pain, and temperature on the skin.
Receptors arising in internal viscera and blood vessels, detecting chemical changes, tissue stretch, and temperature changes.
Receptors in skeletal muscles, tendons, joints, and ligaments that inform the brain of body movements.
A cordlike organ of the PNS composed of bundles of peripheral axons; can be cranial or spinal nerves.
Collections of neuron cell bodies located in the PNS.
Nerves containing both sensory and motor fibers, transmitting impulses to and from the CNS.
Nerves that carry impulses only toward the CNS.
Nerves that carry impulses only away from the CNS.
31 pairs of mixed nerves arising from the spinal cord, supplying the body except the head and part of the neck.
Contain motor (efferent) fibers arising from ventral horn motor neurons that innervate skeletal muscles.
Contain sensory (afferent) fibers arising from sensory neurons in dorsal root ganglia, conducting impulses from peripheral receptors.
Branches of spinal nerves; dorsal rami supply posterior trunk, ventral rami supply limbs and anterior trunk, and meningeal branch innervates meninges and blood vessels.
Interlacing nerve networks formed by ventral rami in cervical, brachial, lumbar, and sacral regions, allowing multiple spinal nerves to innervate a limb.
The neural pathway that enables rapid, involuntary motor responses to stimuli, consisting of receptor, sensory neuron, integration center, motor neuron, and effector.
A rapid, involuntary, predictable motor response to a stimulus that maintains posture and controls visceral activities.
A reflex resulting from practice or repetition, such as driving skills.
An ipsilateral, polysynaptic reflex causing automatic withdrawal of a threatened body part in response to pain.
A reflex that occurs with the flexor reflex to maintain balance by extending the contralateral limb while withdrawing the ipsilateral limb.