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- FILL IN BLANKS smoothstriatedmany cellsone cell per fiberbranchedlong, straightspindle-shapedautorhythmicinvoluntary/autonomicvoluntary/somatic motorCommunication between the motor cortex and the spinal cord is likely to be mediated by fiber tracts. commissural O corpus callosum O projection association none of the answers. 身Which is a symptom of upper motor neuron lesion Absence of all tendon reflexes Flaccid paralysis Presence is fasciculations Abnormal plantar reflex
- The central terminals of afferent neurons mediating spinal reflexes are distributed within the spinal cord, so that :-a- all of them terminate in the same spinal segment of their entry to the cordb- all of them terminate on interneuronsc- all of them subserve spinal reflexesd- they provide pathways for divergence of the incoming sensory impulsesStimulation 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; ActivationMatch 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
- Watch this video (http://openstaxcollege.org/l/motorpathway) to learn more about the descending motor pathway for the somatic nervous system. The autonomic connections are mentioned, which are covered in another chapter. From this brief video, only some of the descending motor pathway of the somatic nervous system is described. Which division of the pathway is described and which division is left out?What would a neuropathy of a cervical somatic motor nerve be expected to cause? Brisk reflexes O Numbness Autonomic dysfunction Muscle atrophylabel these on knee jerk reaction Multipolar neuron cell body/somaUnipolar neuron cell body/somaDorsal horn of spinal cordVentral horn of spinal cordMotor neuron cell bodyOligodendrocytesSchwann CellsSynapse Part 2EPSPCalcium (Ca2+) channelsPresynaptic neuronPostsynaptic neuronSpecific neurotransmitters (which neurotransmitters are involved in this reflex?)Receptor subtypes (which receptor subtypes are involved in this reflex?)
- Motor innervation of the leg proper comes predominantly from the _____ plexus.Dorsal outgrowth of tye medulla. It is involved in the control of movement ?Depolarization of a motor nerve is produced by the ____ of _____ channels in the nodes of Ranvier: Opening, Na+ leak Closing, Na+ voltage-gated Opening, K+ leak Opening, Na+ voltage-gated