REFLEXES AND REACTION TIME Flashcards
- Are voluntary unlike reflexes
- Involves higher brain functions
Reaction Time
An involuntary action which is an instantaneous response to a stimulus
a) reflex
b) axon
c) neuron
d) synapse
Reflex
A reflex occurs via neural pathways in the nervous system known as:
a) neural arcs
b) neuron
c) axon
d) gag reflex
Neural arcs
produced via single synapses between sensory axon and motor neurons
a) somatic nervous system
b) muscle stretch reflexes
c) spinal reflexes
d) somatic reflexes
Spinal reflexes
where neurons connect and communicate with each other
a) reflex
b) axon
c) neuron
d) synapse
Synapse
nerve cells that communicate information to the CNS and the rest of the body
a) reflex
b) axon
c) neuron
d) synapse
Neuron
part of the neuron that carries information to and from the spinal cord
a) reflex
b) axon
c) neuron
d) synapse
Axon
contraction of a muscle in response to its passive stretching
a) physiologic or action tremor
b) superficial reflexes
c) neuron
d) muscle stretch reflexes
Muscle Stretch Reflexes
Where is the cell body of the sensory axon located to illicit a patellar reflex?
a) skin
b) oral cavity
c) dorsal root ganglion in the lumbar region of the spinal cord (L2 to L4)
d) spinal cord
Dorsal root ganglion in the lumbar region of the spinal cord (L2 to L4)
Important in protecting the body from harmful stimuli
a) corneal reflex
b) gag reflex
c) stretch reflex
d) withdrawal reflex
Withdrawal Reflex
causes flexion of your leg AWAY from the stimulus
Flexor muscles
there is an [opposite/same] reaction in the opposite leg to enhance
postural support
opposite
- More complex than a regular myotatic reflex (It involves four neurons)
- Results in a longer delay between stimulus perception
a) ciliospinal reflex
b) achilles reflex
c) vasomotor reflex
d) pupillary reflex
Pupillary Reflex
[Miosis/Mydriasis]
Pupillary constriction
Miosis
[Miosis/Mydriasis]
Pupillary dilatation
Mydriasis
rapid dilation of the ipsilateral pupil (by 1 to 2 mm) with a painful or startling stimulus
a) pupillary reflex
b) carotid sinus reflex
c) ciliospinal reflex
d) gag reflex
Ciliospinal Reflex
Contact with the cornea initiates 2 reflexes:
a) ciliospinal reflex
b) blink reflex
c) corneal reflex
d) blink reflex and tear production
- blink reflex (corneal reflex)
- tear production
- AKA the oculocephalic reflex (doll’s eye reflex)
- Used to test CN Nerves III, VI, VIII
a) withdrawal reflex
b) gag reflex
c) auditocephalogyric reflex
d) synapse
Auditocephalogyric Reflex
- AKA the pharyngeal reflex
- bilateral pharyngeal muscle contraction and
elevation of the soft palate
a) corneal reflex
b) gag reflex
c) cough reflex
d) withdrawal reflex
Gag Reflex
have receptor organs in the skin rather than in muscle fibers
Skin Reflex Arcs
A positive plantar reflex is called:
a) withdrawal reflex
b) miosis
c) babinski sign
d) brudzinskis sign
Babinski sign
A positive plantar reflex is a sign of a disease of the:
pyramidal tract (corticospinal tract)
[TRUE/FALSE]
Sensory neurons = perceive a stimulus
TRUE
[TRUE/FALSE]
Motor neurons = coordinate an action
TRUE
Neurons that help in the integration of sensory information and motor activity
a) interneurons
b) afferent neurons
c) sensory neurons
d) synapse
Interneurons
Where are the receptor organs of the skin reflex arcs located?
Skin
What is the function of the gag reflex?
a) flexion of your leg AWAY from the stimulus
b) attempt to eliminate foreign objects from the oral cavity
c) blink reflex (corneal reflex) and tear production
d) dorsal root ganglion in the lumbar region of the spinal cord (L2 to L4)
Attempt to eliminate foreign objects from the oral cavity
Spinal reflexes use how many neurons?
a) three
b) two
c) one
d) four
Two
