rapid, automatic motor responses to stimuli. Ex. Jerking hand away after touching hot stove; constriction of pupils when eyes are exposed to bright light.

Reflex classification

classified according to what kind of effector they stimulate; either autonomic/visceral or somatic.

Autonomic/visceral reflexes

classification of reflexes; regulate the activity of smooth muscle, cardiac muscle, and glands. Ex. Pupillary reflex; salivary reflex

classification of reflexes; include all reflexes that stimulate skeletal muscles; ex. Patellar/knee jerk is an example because it involves stimulation of the quadriceps femoris muscle group.

the neural pathways over which reflexes occur; 5 components are sensory receptors, sensory/afferent neuron, CNS integration center, motor/efferent neuron, effector organ

relative to the CNS, many reflexes involve only the spinal cord. But, some reflexes do involve certain parts of the brain, such as the photpupillary reflex (the response of pupils to light).

Reflexes can be classed according to

how many synapses occur in the integration center (CNS).

Monosynaptic reflexes

simplest of reflexes; exemplified by the knee-jerk reflex. Involves direct synapse of a sensory neuron w/ a motor neuron. Many skeletal muscles of the boy participate in these stretch reflexes, which help maintain balance and posture

Polysynaptic reflexes

involve one or more (usually many) associated neurons in the CNS that are positioned between the incoming sensory neuron and outgoing motor neuron.

Why isrReflex testing is an important tool

in evaluating the condition of the nervous system. If reflexes are exaggerated, distorted, or absent, nervous system disorders are indicated.

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U3 - Reflexes

Question	Answer
Reflexes	rapid, automatic motor responses to stimuli. Ex. Jerking hand away after touching hot stove; constriction of pupils when eyes are exposed to bright light.
Reflex classification	classified according to what kind of effector they stimulate; either autonomic/visceral or somatic.
Autonomic/visceral reflexes	classification of reflexes; regulate the activity of smooth muscle, cardiac muscle, and glands. Ex. Pupillary reflex; salivary reflex
Somatic reflexes	classification of reflexes; include all reflexes that stimulate skeletal muscles; ex. Patellar/knee jerk is an example because it involves stimulation of the quadriceps femoris muscle group.
Reflex arcs	the neural pathways over which reflexes occur; 5 components are sensory receptors, sensory/afferent neuron, CNS integration center, motor/efferent neuron, effector organ
Effector organ	muscle or gland
Reflexes and the CNS	relative to the CNS, many reflexes involve only the spinal cord. But, some reflexes do involve certain parts of the brain, such as the photpupillary reflex (the response of pupils to light).
Reflexes can be classed according to	how many synapses occur in the integration center (CNS).
Monosynaptic reflexes	simplest of reflexes; exemplified by the knee-jerk reflex. Involves direct synapse of a sensory neuron w/ a motor neuron. Many skeletal muscles of the boy participate in these stretch reflexes, which help maintain balance and posture
Polysynaptic reflexes	involve one or more (usually many) associated neurons in the CNS that are positioned between the incoming sensory neuron and outgoing motor neuron.
Why isrReflex testing is an important tool	in evaluating the condition of the nervous system. If reflexes are exaggerated, distorted, or absent, nervous system disorders are indicated.

Created by: mbtrimm

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