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WorksheetsMuscle Motor Neurons & Burns
Total questions: 34
Worksheet time: 21mins
Which of these are part of the peripheral nervous system?
Upper Motor Neurons
Lower Motor Neurons
Subcortical Circuits
Cerebellum
Nerve Roots
Which of these acts as the “boss” of movement?
Cortical motor neurons
Vestibulospinal tracts
Reticulospinal tracts
Basal ganglia
Cerebellum
Which of these is a muscle with both afferent and efferent fibers for a reflex?
Homonymous muscle
Antagonist muscle
Synergist muscle
Prime mover muscle
Which of these are not true for alpha motor neurons?
supply IFFs in stretch receptor cells
fusimotor
supplies one muscle fiber
skeletomotor
supply EFFs in whole muscle
Which of these are true for the spinal motor control system?
limited to the spinal cord
located in anterior horn
located in posterior horn
activated by spinal efferent fibers
Which reflex is for correcting errors in muscle length after external forces cause excessive stretching?
stretch reflex
golgi tendon reflex
With the brachioradialis reflex, which of these are being activated?
Radial Nerve
C5-6
Musculocutaneous Nerve
C6-7
The knee reflex activates which CNS levels?
L2-4
L1-2
L2-3
L1-3
The biceps brachii reflex activates which of these?
Musculocutaneous nerve
C5-6
Radial nerve
C6-7
C4-5
What’s true about the stretch reflex?
also known as deep tendon reflex
stretch sensed by mechanoreceptors
signals sent to prime mover LMN and antagonist LMN
antagonist LMN is monosynaptic
message sent back through lb fibers to interneurons
Resting muscle tone is caused by stimulation of what motor neurons?
gamma
alpha
cortical
With resting muscle tone, tension is increased with which type of stretch receptor?
static
dynamic
Force generated by a single muscle depends on number of motor neurons recruited and activated, also known as _____ ________.
(a)
Which of these are alternate names for the UMN systems?
suprasegmental motor systems
descending motor systems
intersegmental motor systems
ascending motor systems
superior motor systems
Which of these are part of the pyramidal system?
corticospinal tract
rubrospinal tract
vestibulospinal tract
reticulospinal tract
tectospinal tract
These neurons are glutamatergic and primarily function in motor execution. What are they?
corticospinal neurons
alpha neurons
gamma neurons
vestibulospinal neurons
What is the name of the process that allows IFF muscle fibrils to keep stretch receptors from opening during a voluntary stretch?
(a)
Which of these is the abnormal contraction of individual muscle fibers?
fibrillations
fasciculations
Which is true about fasciculations?
often occur during early LMN dysfunction
often occur during late LMN dysfunction
pathognomonic for LMN injury
axon “dies back” to small branches
Which of these indicate a neuropathic cause with needle EMG?
high amplitude
polyphasic
short duration
increased recruitment
normal duration
Your patient’s EMG shows normal tibial CMAP and low amplitude peroneal CMAP. Superficial peroneal and sural SNAPs are normal. There are large motor units in the tensor fascia lata and anterior tibialis. Medial gastrocnemius, vastus lateralis, rectus femoris, biceps femoris, gluteus maximus, and lumbar paraspinals are normal. What’s most likely?
radiculopathy
neuropathy
focal mononeuropathy
myopathy
Your patient’s EMG shows low amplitude R ulnar, R median, R tibial, and R peroneal CMAPs. SNAPs show low amplitude R median, absent R ulnar, absent R sural. Proximal muscles are normal. There is decreased recruitment of enlarged motor units seen in muscles with distal to proximal gradient, with fibrillation in distal muscles. What’s most likely?
radiculopathy
neuropathy
focal mononeuropathy
myopathy
Your patient’s EMG shows normal R ulnar, R median prolonged DL CMAPs. SNAPs show R median with prolonged DL, low amplitude, normal R ulnar. Decreased recruitment of motor units seen in right abductor pollicis brevis. Deltoid, biceps, triceps, flexor carpi radialis, extensor digitorum communis, extensor carpi radialis, first dorsal interosseous are normal. What’s most likely?
radiculopathy
neuropathy
focal mononeuropathy
myopathy
Your patient’s EMG shows normal peroneal, tibial, median, and ulnar CMAPs. Sural, median, ulnar SNAPs are also normal. Small motor units are seen in biceps, triceps, deltoid, and anterior tibialis. There are positive waves in those muscles and lumbar paraspinals. Medial gastrocnemius, vastus lateralis, rectus femoris, extensor carpi radialis, abductor pollicis brevis, and first dorsal interosseous are normal. What’s most likely?
radiculopathy
neuropathy
focal mononeuropathy
myopathy
Which of these are late signs of UMN dysfunction?
paralysis
plegia
hypertonia
clonus
hyporeflexia
Name the 3rd layer of the epidermis.
(a)
What can be found in the epidermis?
keratinocytes
dendritic cells
sweat ducts
tactile nerve fibers
blood vessels
The mid area of a burn is the zone of …
stasis
coagulation
hyperemia
How much of the total body surface area needs to be affected to be considered a major burn?
> 20%
> 10%
> 30%
> 50%
With burn shock, the recommended IV repletion of salt and water according to the Baxter formula is…
4 ml/kg/% burn
3 ml/kg/% burn
5 ml/kg/% burn
6 ml/kg/% burn
Which of these is responsible for at least 50% of burn deaths?
inhalational injury
dehydration
chemical injury
electrical injury
infection
What’s the indication to use a skin graft?
expected healing > 3 weeks
total body surface area affected > 20%
expected healing > 4 weeks
total body surface area affected > 15%
Which of these are appropriate treatments for burn wound care?
debridement
ventilatory support
hemodynamic support
dry any excess moisture
preserve all skin that remains
Which of these is caused by an acidic chemical injury?
coagulation necrosis
liquefactive necrosis
