S: NCBI – http://www.ncbi.nlm.nih.gov/pubmed/463585 (last access: 14 June 2016); http://ston.jsc.nasa.gov/collections/trs/_techrep/TM-2012-217354.pdf (last access: 14 June 2016).
N: 1. From Greek asthenes (from a- “without” + sthenos “strength”).
2. Asthenia: Weakness. Lack of energy and strength. Loss of strength. Myasthenia refers to a loss of muscle strength, as in myasthenia gravis.
3. Fatigue is one of the most common complaint of medicine and a very usual manner of communication between people. We must avoid to offer any reductionism. Fatigue is often related with physical and psychological symptoms. The inquiry is always difficult. Asthenia is a fatigue without or before effort. The world of the patient is subverted and we have to try to discover the meaning of this strange situation.
S: 1 & 2. http://www.medicinenet.com/script/main/art.asp?articlekey=32122 (last access: 14 June 2016). 3. http://www.ncbi.nlm.nih.gov/pubmed/7843047 (last access: 14 June 2016).