Middle Cerebral artery is one of the Terminal branch of cerebral part of Internal carotid artery and is the largest branch.  Normally lies in the lateral cistern with superficial middle cerebral vein comes I the  lateral sulcus  and divides into two division as superior and inferior division in the research study middle cerebral artery divides into three divisions as superior, middle and inferior divisions.                         For the description of middle cerebral artery there are two approaches are used as functional and segmental approach.  Segmental approach is the M1 segment, M2, M3 and M4 segment.  M1 segment is the origin of middle lateral artery from the cerebral part of internal carotid artery.  Normally M1 segment is 14–16mm.30 mm is noted in the three division of middle cerebral artery .  Lumen size  normal as 3–6 mm.  6 mm is noted in three division of middle cerebral artery and M1 length is 30 mm stem of M1 gives only lenticulo striate branches normally .  In this research orbito frontal branch arteries from the stem and connected with fronto polar branch of middle cerebral artery .