Each question in this quiz is timed.
In sterognosis, all of the following are true EXCEPT
Highly educated sensation
Mixed sensation
needs previous experience and intact sensory association cortex
intact in case of lesion in sensory cortex
the most specific synapse is
Axosomatic
Axoaxonic
Axodendritic
Regarding fine touch
Slowly adapting
carried by Ab aferent
Transmit through anterolateral system
Poorly localized sensation perceived at the thalamus
Enkephalin blocks pain transmission by:-
blocking the response of pain receptors to painful stimuli
Slowing down transmission of pain impulses through synapses in the pain Pathway
Inhibiting the response of the cerebral cortical somatic sensory area to pain Signals
Blocking Ca ++ channels in the central terminals of pain sensory fibers
IPSP differs from EPSP in:-
being of shorter duration
being unable to summate spatially
Moving the membrane potential away from threshold
Depending upon opening of voltage Na + channels
Intermittent Claudications evoke:-
Fast pain
Visceral pain
Deep pain
Cutaneous hyperalgesia
Colicky pain
Astereognosis:-
indicates inability to localize the site of touch on the body surface
Results from lesions of the secondary somatic sensory area
Somatic Association area malfunction
Results from loss of crude touch sensation
Presynaptic inhibition depends upon:-
Augmented realease of neurotransmitter from presynaptic terminal
Continued depolarization of presynaptic terminals
GABA receptors in presynaptic terminals
Opening of voltage-gated Ca ++ channels in presynaptic terminals
Synaptic fatigue is due to: -
decreased synthesis of neurotransmitters
Inability to release neurotransmitters by exocytosis
Failure of action potentials to open voltage-gated Ca ++ channels in Presynaptic terminal
Imbalance in between rates of synthesis and release of neurotransmitters
Reaction to pain includes all the following, except:-
increased heart rate
Depression
Withdrawal reflexes
Stoppage of impulse discharge from nociceptors in chronic painful conditions
