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NERVOUS SYSTEM The principle that in spinal cord, the dorsal roots are sensory and the ventral roots are motor, is known as:
A. Bell-Magendie law
B. Dales principle
C. Monro-Kellie hypothesis
D. Mullers doctrine
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Sensation of itching involves all of the following EXCEPT:
A. C fibres
B. Naked nerve endings
C. Histamine
D. Pacinian corpuscles
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During REM sleep, there is a marked reduction in the tone of skeletal muscles in:
A. Neck
B. Upper limb
C. Lower limb
D. Diaphragm
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Normal CSF pressure is:
A. 180-260mm H2O
B. 70-180mm H2O
C. 180-260mm Hg
D. 70-180mm Hg
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The distance by which two touch stimuli must be separated to be perceived as two separate stimuli is greatest on:
A. The lips
B. The palm of the hand
C. The back of scapula
D. The dorsum of the hand
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Thalamus is the sensory relay station for all of the following sensations except:
A. Pain
B. Fine touch
C. Taste
D. Olfaction
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Brown - sequard syndrome
A. Pain loss in the opposite side of lesion
B. Fine touch lost in opposite side of lesion
C. UMN paralysis in opposite side of lesion
D. LMN paralysis in opposite side of lesion
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The decerebrate rigidity is characterised by all of the following EXCEPT
A. Rigidity occurs in all muscles of the body
B. There is increased g motor neuron discharge
C. Increased excitability of the motor neuron pool
D. Removal of cerebellum reduces the rigidity
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Climbing fiber is:
A. An output fiber
B. An inhibitory fiber
C. afferent from inferior olivary nucleus
D. afferent from multiple sources
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Purkinje cells of the cerebellar cortex are excited by:
A. Stellate cells
B. Basket cells
C. Granule cells
D. Golgi cells
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Stereognosis is lost due to a lesion of:
A. Fasciculus cuneatus
B. Fasciculus gracilis
C. Lateral spinothalamic tract
D. Anterior spinothalamic tract
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Damage to which of the following hypothalamic nuclei results in hyperphagia and obesity?
A. Ventromedial nucleus
B. Lateral nucleus
C. Supra-optic nucleus
D. Paraventricular nucleus
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Noradrenergic neurons are chiefly present in:
A. Locus ceruleus
B. Nucleus accumbens
C. Nucleus raphe magnus
D. Nigrostriatal pathway
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The mechanism of learning and memory include all except:
A. Changes in level of neurotransmitter at synapse
B. Increasing protein synthesis
C. Recruitment by multiplication of neurons
D. Spatial reorganization of synapse
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The first reflex response to appear as spinal shock wears off in humans is:
A. Tympanic reflex
B. Withdrawal reflex
C. Neck righting reflex
D. Labyrinthine reflex
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Synaptic potentials can be recorded by:
A. Patch clamp technique
B. Voltage clamp technique
C. Microelectrode
D. EEG
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Which one of the following clearly states the role of cerebellum in motor performance?
A. Planning and programming of movement
B. Convert abstract thought into voluntary action
C. Initiation of skilled voluntary action
D. Smoothens and coordinates ongoing movements
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Drinking can be induced by
A. Electrical stimulation of the posterior hypothalamus
B. Osmotic stimulation of supraoptic nucleus
C. Lesions in the paraventricular nucleus
D. Neuronal lesion of the preoptic nucleus
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The inhibitory neurotransmitter in CNS neurons is:
A.Glutamate
B.Aspartate
C. Gamma-amino butyric acid (GABA)
D.Acetyl choline (Ach)
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Which of the following statements is true for excitatory postsynaptic potentials (EPSP):
A. Are self-propagating
B. Show all-or-none response
C. Are proportional to the amount of transmitter released by the presynaptic neuron
D. Are inhibitory at presynaptic terminal
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All of the following are the features of pyramidal tract lesion EXCEPT:
A. Cog-wheel rigidity
B. Spasticity
C. Extensor plantar response
D. Exaggerated deep tendon reflexes.
