Hyponatremia has been reported in up to 30% of the elderly in nursing homes and is also present in approximately 30% of people who are depressed on selective serotonin reuptake inhibitors.People who have hyponatremia who require hospitalisation have a longer length of stay (with associated increased costs) and also have a higher likelihood of requiring readmission. This is particularly the case in men and in the elderly. References
Further reading
Sandy Craig; Erik D Schraga; Francisco Talavera; Howard A Bessen; John D Halamka (2010-04-13). "Hyponatremia in Emergency Medicine". Medscape. Kugler JP, Hustead T (June 2000). "Hyponatremia and hypernatremia in the elderly". Am Fam Physician. 61 (12): 3623–30. PMID 10892634. James L. Lewis, III, MD (May 2009). "Hyponatremia". Merck Manual of Diagnosis and Therapy. {{cite web}}:  CS1 maint: multiple names: authors list (link)
Elizabeth Quinn (2011-03-07). "What Is Hyponatremia: Hyponatremia or water intoxication – Can Athletes Drink Too Much Water?". About.com. External links
Hyponatremia at the Mayo Clinic
Sodium at Lab Tests Online
ICD-10 code for Hyponatremia - Diagnosis Code
FES is applied to lower extremities for improving functional walking in stroke patients;  for the correction of foot drop. They have benefited patients by improving gait speed, muscle strength and other functions.Treatment for some can be as easy as an underside "L" shaped foot-up ankle support (ankle-foot orthoses). Another method uses a cuff placed around the patients ankle, and a topside spring and hook installed under the shoelaces. The hook connects to the ankle cuff and lifts the shoe up when the patient walks. Both these techniques show significant improvement on usage. Identification of a suspect in a murder case
In December 2021, police in Toronto, Canada said they were looking for a person with a distinctive gait as a suspect in the murder of Barry Sherman and Honey Sherman. Medical professionals  quoted by the Toronto Star said that the distinctive gait could  be caused by foot drop. See also
Yoga foot drop
Toe walking
Polymyositis
inclusion body myositis

References
Further reading
Agency for Healthcare Research and Quality (2011). Healthcare Cost and Utilization Project. Balali-Mood, Mahdi (January 2008). "Neurotoxic disorders of organophosphorus compounds and their managements". Arch Iran Med. 11(1):65–89. PMID 18154426. Jokanovic, Milan, Melita Kosanovic, Dejan Brkic, and Predrag Vukomanovic (2011). "Organophosphate Induced Delayed Polyneuropathy in Man: An Overview". Clinical Neurology and Neurosurgery 113.1: 7–10. PMID 20880629. doi:10.1016/j.clineuro.2010.08.015. Mayo Clinic. "Foot Drop". Pritchett, James W., MD (June 21, 2018). "Foot Drop". Vinod K Panchbhavi, MD, FACS (ed.). Saladin, Kenneth (2015). Anatomy & Physiology: A Unity of Form & Function. 7th ed. New York: McGraw-Hill Education. Print.