13 Questions
Which of the following is the MAIN pathway for control of voluntary movement?
Corticospinal tract
Which lobe of the brain is responsible for the perception and recognition of auditory stimuli, memory, and speech?
Temporal lobe
What is the MAIN difference between a central (upper motor neuron) lesion and a peripheral (lower motor neuron) lesion?
Central lesions cause spastic paresis, while peripheral lesions cause flaccid paresis.
Which body part has the largest representation in the motor homunculus?
Hand
What is the MAIN effect of a lesion to the internal capsule?
Dense hemiplegia
What are the clinical signs associated with a lesion of the upper (central) motor neuron, pyramidal tract?
Increased muscle tone and spastic pyramidal signs
What are the characteristics of peripheral (flaccid) paresis/paralysis?
Muscle fasciculations and atrophy
Which area of the brain controls voluntary movements of specific body parts?
Primary motor cortex
What is the primary difference between upper motor neuron (UMN) pyramidal tract lesions and anterior horn cell lesions?
Increased muscle tone vs. muscle fasciculations
Which part of the brain contributes to the control of movements and planning of complex movements?
Premotor cortex, SMA
What signs are indicative of a peripheral (flaccid) paresis/paralysis?
Hyporeflexia/areflexia and muscle fasciculations
Which area of the brain is responsible for visual processing?
Occipital lobe
What is the primary function of the corticospinal tract in the motor system?
Control of voluntary movement
Test your knowledge on central and peripheral motor neuron syndromes, including their structures, functions, clinical signs, and topographical and etiological diagnoses. Explore the different areas of the central nervous system and peripheral nervous system, including the brain, spinal cord, cranial nerves, and peripheral nerves.
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