1 This is the primary investigation for all causes and is especially important when one has had a traumatic incident like a fall or a road accident.  MRI helps in diagnosis of injuries and abnormalities like slip disc, intervertebral disc protrusion, nerve compression, and so on.
However, the equinox marks  the changes of seasons and September 22nd or 23rd is the normal  date for the equinox. Therefore, prior to the equinox, September is  technically summer in the northern hemisphere and changes to fall  at the equinox. Conversely, in the southern hemisphere, prior to  the equinox, September is considered winter and changes to spring  at the equinox. 2 people found this useful.
Due to the tilt of Earth's rotation relative to the Sun and the ecliptic plane, summer is from December to March and winter is from June to September. September 22 or 23 is the vernal equinox and March 20 or 21 is the autumnal equinox. The South Pole is in the middle of the southern hemisphere.