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Related Concept Videos

Guidelines for Writing Outcome01:11

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When developing expected outcomes for a patient care plan, the nurse should adhere to the following recommendations:
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In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction...
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The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
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Primary distribution systems deliver electrical power from substations to consumers through various voltage classes, with 15-kV class voltages being predominant among U.S. utilities. Older 2.5- and 5-kV classes are being replaced by 15-kV primaries, while higher 25- to 34.5-kV classes are used in high-density urban areas and rural regions with long feeders. Three-phase, four-wire multigrounded systems are widely employed for balanced power delivery, using the neutral wire as a grounding point.
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Related Experiment Video

Updated: Feb 2, 2026

MRI-guided Focused Ultrasound Thalamotomy for Patients with Medically-refractory Essential Tremor
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Primary Writing Tremor.

Ana Vives-Rodriguez1, Christine Y Kim1, Elan D Louis1,2,3

  • 1Division of Movement Disorders, Department of Neurology, Yale School of Medicine, Yale University, New Haven, CT, USA.

Tremor and Other Hyperkinetic Movements (New York, N.Y.)
|November 8, 2018
PubMed
Summary
This summary is machine-generated.

Primary writing tremor (PWT) is a rare condition causing shaking mainly during writing. This tremor disorder shares features with dystonia and essential tremor, presenting unique diagnostic challenges.

Keywords:
Primary writing tremordystoniaessential tremorwriter’s cramp

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Area of Science:

  • Neurology
  • Movement Disorders

Background:

  • Primary writing tremor (PWT) is an uncommon neurological condition characterized by tremor predominantly during writing tasks.
  • It presents a diagnostic challenge due to overlapping symptoms with other tremor and dystonia disorders.

Observation:

  • Phenomenological illustration of PWT reveals characteristic tremor patterns during writing.
  • Subtle dystonic posturing may be observed during neurological examination in individuals with PWT.

Findings:

  • PWT exhibits a unique clinical profile, distinguishing it from essential tremor and primary dystonia.
  • The condition highlights the complex interplay between tremor and dystonic features in movement disorders.

Implications:

  • Understanding PWT's distinct phenomenology aids in accurate diagnosis and differential diagnosis.
  • Further research into PWT can elucidate shared pathophysiological mechanisms with essential tremor and dystonia.