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WorksheetsWeek 3 - PNS
Total questions: 20
Worksheet time: 20mins
True or False: There are 12 pairs of cervical nerves.
True
False
An L4/L5 posterolateral disc protrusion will exhibit signs of
L4 nerve root impingement
L5 nerve root impingement
S1 nerve root impingement
None of the above
(a) roots receive input from interneurons.
An L4/L5 left posterolateral disc protrusion will exhibit the following symptoms (check all that apply)
L Great Toe Extension
Numbness/tingling of the L lateral border of the foot.
Numbness/tingling of the L interdigit space between the first and second toe
Decreased MMT strength of L Glute Max
Which of the following is NOT true?
Injury to the dorsal ramus may disrupt sensation of the back.
Injury to the ventral root may disrupt sensation of the anterior torso.
Injury to the dorsal root may disrupt afferent signals entering the spinal cord.
Injury to the ventral ramus may disrupt sensation of the innervated upper limb.
Cervical, brachial, and lumbosaral plexi are all derived from the (a) rami.
Which epithelial tissue covering surrounds a fascicle of nerve fibers?
Perineurium
Endoneurium
Epineurium
All of the above
Check all of the correct statements:
Depolarization will occur via saltatory conduction in unmyelinated axons.
The larger the myelinated fiber, the slower the conduction.
The maximum speed in which impulses can travel in a myelinated axon is 15m/s.
As Nodes of Ranvier become farther apart, the speed of conduction becomes faster.
A 28 y.o. patient presents to your clinic with a scaly rash along the middle portion of their L posterior UE. The rash is painful and sensitive to touch, and was present several months ago after the patient experienced a traumatic MVA. Further history reveals that this patient has had a case of herpes zoster when they were younger. This rash is mostly a sign of:
Chicken Pox
Shingles
Multiple Sclerosis
Lower Motor Neuron Lesion
A 28 y.o. patient presents to your clinic with a scaly rash along the middle portion of their L posterior UE. The rash is painful and sensitive to touch, and was present several months ago after the patient experienced a traumatic MVA. Further history reveals that this patient has had a case of herpes zoster when they were younger.
Given the presentation, what structure is most likely involved? (Hint: middle portion of the posterior L UE)
L C5 dorsal root
L C6 dorsal ramus
L C7 dorsal root ganglion
L C7 dorsal root
Upon testing of a patient's tendon reflexes, you notice that their ankle does not plantarflex upon hitting the R achilles tendon with your reflex hammer. What nerve root is most likely invovled?
L L5
R L5
L S1
R S1
When performing a L ankle jerk reflex test, the inhibitory interneuron of which muscle is most likely activated?
L Gastrocnemius mm.
L Soleus mm.
L Peroneus Longus mm.
L Tibialis Anterior mm.
Monocytes exert a (a) effect on Schwann cells during Wallerian degeneration.
A person with an acute stab wound into their L brachial plexus demonstrates with complete flaccid paralysis of their L wrist and hand, with no motor control present . This type of nerve injury would most likely be considered as (a)
In the PNS, Schwann cells will send out (a) towards the injured proximal axonal stump in order to facilitate regeneration
Which statement(s) is/are NOT true regarding regeneration of the nervous system?
The peripheral nervous system regenerates slower than the central nervous system.
Dying neurons in the CNS may cause transneuronal atrophy of surrounding neurons.
Debris can exist for up to 6 months in the PNS.
Denervated muscles can remain viable for up to 2 years before the onset of severe atrophy.
A patient presents with a chronic medical history of decreased sensation of the R LE. Monofilament testing demonstrates impaired sensation of the R big toe when using a 5.07 monofilament, however the patient demonstrates perceived sensation when using a 6.10 monofilament. There is slight motor weakness of the R ankle dorsiflexors and R ankle everters. Previously, the patient states she had a remission period after taking antibiotics, but had relapsed after terminating her prescription early. This patient most likely presents with signs and symptoms consistent with:
Peripheral Neuropathy
Relapse-Remitting Multiple Sclerosis
Guillain-Barre Syndrome
Hansen's Disease
A patient presents with a chronic medical history of decreased sensation of the R LE. Monofilament testing demonstrates impaired sensation of the R big toe when using a 5.07 monofilament, however the patient demonstrates perceived sensation when using a 6.10 monofilament. There is slight motor weakness of the R ankle dorsiflexors and R ankle everters. Previously, the patient states she had a remission period after taking antibiotics, but had relapsed after terminating her prescription early.
The nerve most likely associated with this presentation is:
R Femoral Nerve
R Common Peroneal Nerve
R Tibial Nerve
R Sural Nerve
A patient presents with stocking-glove syndrome following hospitalization due to the flu 3 weeks ago. MMT testing demonstrates B UE weakness in wrist flexion, wrist extension, elbow flexion, and shoulder abduction. This presentation is most consistent with:
Adhesive Capsulitis
Hansen's Disease
Guillain-Barre Syndrome
Multiple Sclerosis
A patient presents with stocking-glove syndrome following hospitalization due to the flu 3 weeks ago. MMT testing demonstrates B UE weakness in wrist flexion, wrist extension, elbow flexion, and shoulder abduction. This presentation is most consistent with:
damage to the central nervous system.
damage to the peripheral nervous system.
damage to the sympathetic nervous system.
damage to the somatosensory cortex.
