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1-fine sensations of touch are transmitted by :
a-anterior spinothalamic tract
b-posterior spinocerebellar tract
c-dorsal column tract
d-lateral spinothalamic tract
e-anterior spinocerebelar tract
2-after a pain stimulus is applied , fast pain is felt within which of the following time frames ?
e- 1 nanosec
3-pain receptors in the skin are classified as which of the following ?
a-encapsulated nerve endings
b-a single class of morphologically specialized receptors
c-the same type of receptor that detects position sense
d-free nerve endings
4-transmitter agent is used by the fast pain fibers at their synapses in dorsal horn ?
e-calcitonin gene related peptide
5-inhibition of pain signals by tactile stimulation of a skin surface involves which of the following ?
a-Type A alpha
b-type A beta
c-type A sigma
d-type c fibers
e-golgi tendon organ
6-within the primary somatosensory cortex , various parts of the contra-lateral body surface are represented in areas of varying sizes that reflect which of the following ?
a-relative size of the body parts
b-density of specialized peripheral receptors
c-size of muscles in the body parts
d-conduction of velocity of the primary afferent fibers
e-size of the primary afferent fibers
7-loss of pain sensations on one side of the body coupled with loss of proprioception , precise tactile localization , and vibratory sensations on the contralateral side of the body ?
b-thalamic pain syndrome
c-lateral medullary syndrome
d-brown sequard sydrome
8-position sense or more commonly proprioceptive sensation involves muscle spindle and which of the following ?
a-skin tactile receptor
b-deep receptors in joint capsule
c-both tactile and joint capsule receptors
9-sensory neurons :
a-about 10 million sensory neurons
c-deliver information to the CNS
d-all of the above
10-ataxia results due to damage of :
b-dorsal column tract
11-most common transmitter in the body :
12-which is not a neurotransmitter :
13-the thalamus :
a-final relay for ascending sensory information
b-smell is the only sensation that doesnt relay in it
e-none of the above
14-regarding receptors in the skin :
a-all skin receptors are encapsulated
b-the receptive fields of touch receptors are uniform in area
c-noci receptors of the skin are bare nerve endings
d-all sensory information from the skin reaches the brain via the dorsal column pathway
15-one presynaptic cell releases dopamine while another releases seretonin at their synapses , sumation of these signals would most likely ......... a postsynaptic neuron
d-all of the above