1876808
Beschreibung
Quiz von #أطباء_2020 , aktualisiert more than 1 year ago
|
|
Erstellt von #أطباء_2020
vor fast 10 Jahre
|
|
Frage 1
Frage
regarding reflexes :
Antworten
-
a monosynaptic reflex arc involves one or more interneurons
-
the knee jerk reflex is an example of a stretch reflex
-
interneurons are the final common path for all reflexes
-
withdrawal reflexes are lost following cervical section of spinal cord
-
none of the above
Frage 2
Frage
motor impulses are transmitted by :
Antworten
-
dorsal root of spinal nerves
-
dorsal root ganglia of spinal nerves
-
ventral roots of spinal nerves
-
none of above
-
all of the above
Frage 3
Frage
which of the following is the type of neuron whose axons forms synaptic junctions with sk. muscle cells "intrafusal fibers" within the muscle spindles ?
Antworten
-
alpha motor neurons
-
pyramidal neurons
-
gamma motor neurons
-
granule cells
-
purkinje cells
Frage 4
Frage
which of the following types of neurons is the efferent of nuclear bag intrafusal fibers that signal a change in muscle length ?
Antworten
-
static gamma motor neurons
-
alpha motor neurons
-
dynamic gamma motor neurons
-
corticospinal neuron
-
renshaw cell
Frage 5
Frage
which of the following receive direct synaptic input from Golgi tendon organs ?
Antworten
-
type Ia inhibitory interneurons
-
dynamic gamma motor neurons
-
alpha motor neurons
-
type Ib inhibitory interneurons
-
type II excitatory interneurons
Frage 6
Frage
concerning motor cortex :
Antworten
-
the motor areas of the cortex are situated in the postcentral gyrus
-
following a cerebral haemorrhage affecting the precentral gyrusof the right hemisphere , the patient feels no sensations on left side of the body
-
the corticospinal tract provides the only connection between the motor cortical areas and the spinal cord
-
motor areas of the cortex receive somatosensory input via the thalamus
Frage 7
Frage
which statement concerning the premotor cortex is correct ?
Antworten
-
the premotor cortex is located just posterior to the primary cortex
-
the lateral to medial sequenc in the somatotopic organization of premotor cortex is the reserve of that seen in the primary motor cortex
-
stimulation of a small discrete group of neurons in the premotor cortex produces contraction of an individual muscle
-
stimulation of the premotor cortex does not lead to any muscle activation
-
the premotor cortex sets the specefic posture required for the limb to produce the desired movement
Frage 8
Frage
a stroke involving the middle cerebral artery on the left side is likely to cause which of the following symptoms ?
Antworten
-
paralysis of left side of face and left upper extremity
-
paralysis of left lower extremity
-
complete loss of vision in both eyes
-
loss of ability to comprehend speech
-
loss of vision in left eye
Frage 9
Frage
the withdrawal reflex is initiated by stimulation delivered to which of the following receptors?
Antworten
-
muscle spindle
-
joint capsule receptor
-
cutaneous free nerve ending
-
golgi tendon organ
-
pacinian corpuscle
Frage 10
Frage
paralysis can result from physical damage to the spinal cord Examples of extensive damage to the spinal cord are :
Antworten
-
quadriplegia
-
paraplegia
-
planter reflex
-
A & B only
-
None of the above
Frage 11
Frage
function of cerbellar neurons is,
Antworten
-
basket cells evoke excitatory response in purkinje cells
-
granule cells evoke excitatory response in purkinje cells
-
golgi cells evoke excitatory response in basket cells
-
purkinje cells evoke excitatory responses in cerebellar nuclear cells
-
stellate cells evoke excitatory responses in basket cells
Frage 12
Frage
regarding to basal ganglia in motor control :
Antworten
-
disorder of the basal ganglia produces a marked loss of both sensation and motor control
-
parkinsonism is caused by neuronal degeneration within the substantia nigra
-
the globus pallidus projects directly to the cerebral cortex
-
site of intiation of fine movement
Frage 13
Frage
which of the following terms describes the cerebellar deficit in which there is failure to perform rapid alternating movement:
Antworten
-
past pointing
-
intention tremor
-
dysarthia
-
cerebellar nystagmus
-
dysdiadokokinesia
Frage 14
Frage
concerning muscle spindle :
Antworten
-
primary afferents arise from nuclear chain fibers only
-
secondery endings arise from both nuclear bag and nuclear chain
-
primary afferent belongs to type Ib fibers
-
primary afferent has the highest conduction velocity in the body
Frage 15
Frage
activation of gamma motor neuron :
Antworten
-
causes relaxation of extrafusal muscle fibers
-
causes the contraction of intrafusal muscle fibers
-
makes the muscle spindle more sensitive to stretch
-
relax the muscle spindle
-
a , b & c
Frage 16
Frage
regarding upper motor neuron :
Antworten
-
it originates from the anterior horn
-
its chronic lesion causes falccid paralysis
-
fibrellation is common with its lesion
-
its lesion is associated with clasp-knife pattern of hypertonia
Frage 17
Frage
in generation of motor act :
Antworten
-
area 4 responsible for planning
-
area 6 and basal ganglia help in planning
-
spino-cerebellum helps in planning
-
lateral cerebellum adjust the ongoing movement
-
generation of idea occurs in the occibital lobe
Frage 18
Frage
in basal ganglia :
Antworten
-
activity in the direct pathway results in increased thalamo-cortical activity
-
dopamine activate the indirect pathway
-
globus pallidus externa is a part of the direct pathway
-
acetyl-choline activates the direct pathway
-
parkinsonism associated with increased activity in the direct pathway
Frage 19
Frage
ataxia is defined as :
Antworten
-
inability to perform rapidly alternating movements
-
error in the range of movement
-
lack lack of continuity in the execution of movements
-
error in the rate , force and direction of movement
-
weakness
Frage 20
Frage
walking is controlled by groups of neurons of the spinal cord called :
Antworten
-
nuclea and ganglia
-
the limbic system
-
central pattern generators
-
dorsal and ventral horns
-
corticospinal tract
Möchten Sie mit GoConqr kostenlos Ihre eigenen Quiz erstellen? eigenen Mehr erfahren.