It is also known as laryngeal dystonia. The term spasmodic describes sudden and intermittent jerking movements of muscles and, as such, SD is characterised by poor vocal motor control during speech due to intermittent and involuntary spasms of the laryngeal muscles.
Low iron levels are one of the most common reasons for chronic coldness. Here's why: Iron is a key mineral that helps your red blood cells carry oxygen throughout your body, bringing heat and other nutrients to every cell in your system, explains Dr. Phillips.
People exposed to very cold temperatures die from hypothermia, which occurs when the core body temperature drops from the normal range of 98.6 degrees Fahrenheit (37 degrees Celsius) to below 95 degrees Fahrenheit (35 degrees Celsius).