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Related Concept Videos

Fatigue01:21

Fatigue

Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
Atypical Pneumonia01:14

Atypical Pneumonia

Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease include...
Muscle Recovery and Fatigue01:24

Muscle Recovery and Fatigue

Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective response...
Myasthenia Gravis ll: Pathophysiology01:22

Myasthenia Gravis ll: Pathophysiology

The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...
Myasthenia Gravis: Overview and Treatment01:20

Myasthenia Gravis: Overview and Treatment

Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which leads...
Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...

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Related Experiment Video

Updated: Jul 10, 2026

The Treadmill Fatigue Test: A Simple, High-throughput Assay of Fatigue-like Behavior for the Mouse
09:25

The Treadmill Fatigue Test: A Simple, High-throughput Assay of Fatigue-like Behavior for the Mouse

Published on: May 31, 2016

Atypical fatigue.

Kathy Sharp1

  • 1Blue Ridge Medical Specialists, Bristol, TN, USA. mulekat@charter.net

Clinical Journal of Oncology Nursing
|October 27, 2007
PubMed
Summary

This case study explores persistent fatigue in a breast cancer survivor undergoing tamoxifen therapy. It highlights potential impacts of adjuvant endocrine therapy on energy levels and weight management.

Area of Science:

  • Oncology
  • Endocrinology
  • Geriatric Medicine

Background:

  • A 63-year-old female with a history of estrogen receptor-positive, progesterone receptor-positive, HER2-negative intraductal carcinoma presents for breast cancer follow-up.
  • Treatment included modified radical mastectomy and adjuvant chemotherapy (doxorubicin, cyclophosphamide), completed nine months prior.
  • The patient is currently on adjuvant tamoxifen therapy and has a history of moderate obesity and hypertension.

Observation:

  • The patient reports persistent, significant fatigue and daytime sleepiness, despite completing chemotherapy.
  • She notes difficulties with weight management, suspecting tamoxifen is hindering her efforts.
  • She has not engaged in regular exercise since her diagnosis.

Findings:

  • Persistent fatigue and sleepiness may be a side effect of adjuvant tamoxifen therapy in breast cancer survivors.

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Evaluating the Role of Mitochondrial Function in Cancer-related Fatigue
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Evaluating the Role of Mitochondrial Function in Cancer-related Fatigue

Published on: May 17, 2018

Related Experiment Videos

Last Updated: Jul 10, 2026

The Treadmill Fatigue Test: A Simple, High-throughput Assay of Fatigue-like Behavior for the Mouse
09:25

The Treadmill Fatigue Test: A Simple, High-throughput Assay of Fatigue-like Behavior for the Mouse

Published on: May 31, 2016

Evaluating the Role of Mitochondrial Function in Cancer-related Fatigue
08:56

Evaluating the Role of Mitochondrial Function in Cancer-related Fatigue

Published on: May 17, 2018

  • Tamoxifen's potential impact on metabolism and energy levels warrants further investigation in this patient population.
  • Obesity and lack of physical activity may exacerbate treatment-related fatigue.

    • Implications:

    • Further investigation into the management of persistent fatigue in breast cancer survivors on endocrine therapy is needed.
    • Exploring the interplay between tamoxifen, weight management, and energy levels is crucial for improving quality of life.
    • Personalized interventions addressing both treatment side effects and lifestyle factors may enhance patient recovery and well-being.