Which of the following would result in no movement (i.e. no activation of the mo cortex)? Stimulation of D2 Medium Spiny Neurons Stimulation of D1 Medium Spiny Neurons Inhibition of the Globus Pallidus Interna O Inhibition of the Globus Pallidus Externa Both A & D are correct

Which of the following would result in no movement (i.e. no activation of the mo cortex)? Stimulation of D2 Medium Spiny Neurons Stimulation of D1 Medium Spiny Neurons Inhibition of the Globus Pallidus Interna O Inhibition of the Globus Pallidus Externa Both A & D are correct

Medical Terminology for Health Professions, Spiral bound Version (MindTap Course List)

8th Edition

ISBN:9781305634350

Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. Schroeder

Publisher:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. Schroeder

Chapter4: The Muscular System

Section: Chapter Questions

Problem 32LE: A _______________ is a drug that causes temporary paralysis by blocking the transmis- sion of nerve...

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Concept explainers

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.

Question

Which of the following would result in no movement (i.e. no activation of the motor
cortex)?
Stimulation of D2 Medium Spiny Neurons
Stimulation of D1 Medium Spiny Neurons
Inhibition of the Globus Pallidus Interna
Inhibition of the Globus Pallidus Externa
Both A & D are correct

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The role of γ-motor neurons in regulation of equilibrium is achieved by :-a- initiating contraction of spindle fibers which directly antagonize postural deviationb- increasing spindle sensitivity to stretchc- directly stimulating extrafusal muscle fibers to antagonize postural deviationd- directly adjusting the discharge of α-motor neurons innervating the extrafusal muscle fibers to antagonize postural deviation
γ-motor neuron discharge to a muscle is inhibited by impulses reaching the γ-motor neurons from all the following source, except :-a- Golgi tendon organs of the same muscleb- spindles of antagonistic musclesc- medullary reticular formationd- pontine reticular formation
Hypertonia of UMN lesions is characterized by :-a- increased inhibitory discharge from the premotor areab- inhibition of pontine reticular formationc- increased γ-motor neuron discharge d- decreased muscle spindle discharge
Stimulation of D1 Medium Spiny Neurons in the Striatum causes of the Globus Pallidus and subsequent of the motor cortex. Inhibition; Interna; Activation Activation; Interna; Inhibition Inhibition; Externa; Activation Activation; Interna; Activation
Sort the structures that the action potential would pass through after being generated by the first order sensory neuron. Drag and drop options into correct order and submit. thalamus anterior ramus of spinal nerve posterior root and rootlets somatosensory cortex of the cerebrum posterior funiculus brainstem brachial plexus posterior grey horn ||| ||| = ||| = ||| = ||| = ||| ||| ||| =
Match functions with parts of the central nervous system (CNS) This structure regulates voluntary movements (checks what the brain has instructed against what is actually happening) The primary motor area is located here This structure is a major sensory relay centre Thirst and satiety centres are located here
Co-activation of α and γ-motor neurons :-a- increases γ-motor neuron discharge whenever the activity of α-motor neurons rises to a high levelb- is mediated by interneurons that link the α and γ-motor neuronsc- maintains the proprioceptive information to higher centers during muscle contractiond- increases the α-motor neuron discharge whenever the activity of γ-motor neurons rises to a high level
Lower motor neuron lesions cause all the following, except :-a- decreased number of transmitter receptors in the denervated muscleb- atrophy of the denervated musclec- flaccid paralysis of the denervated muscled- loss of flexion withdrawal reflex
Increased γ-motor neuron discharge stimulates muscle spindles, because :-a- it produces stretch of the extrafusal muscle fibersb- it causes stretch of the peripheral regions of the intrafusal fibersc- it causes stretch of the central region of the intrafusal fibersd- it stimulates directly the sensory fibers innervating muscle spindles
Approximately where would one look to find the somatic motor neurons whose axons comprise the tibial n. of the lumbosacral plexus? Sacral vertebral region Cervical vertebral region O Inferior thoracic vertebral region Inferior lumbar vertebral region.
Several of the events that occur between the time a physician strikes apatient’s patellar tendon with a rubber hammer and the time the quadriceps femoris contracts (knee-jerk reflex) are listed below:(1) increased frequency of action potentials in sensory neurons(2) stretch of the muscle spindles(3) increased frequency of action potentials in the alpha motor neurons(4) stretch of the quadriceps femoris(5) contraction of the quadriceps femorisWhich of the following most closely describes the sequence ofevents as they normally occur?a. 4,1,2,3,5 c. 1,4,3,2,5 e. 4,2,3,1,5b. 4,1,3,2,5 d. 4,2,1,3,5
Label on the diagram: 1. Muscle spindle 2. Sensory neuron 3. Soma of sensory neuron 4. Dorsal root 5. Dorsal root ganglion 6. Dorsal horn 7. Ventral horn 8. Motor neuron to quad 9. Motor neuron to biceps 10. Excitatory synapse 11. Inhibitory synapse What is the name of this reflex? e20SPm idton, How many neurons are Tap your partner's patellar ligament to test their reflexes and try tapping the belly of the brachioradialis muscle to see what happens. involved?