Connections of Functional Areas of Subero Lateral Surface of Brain by Middle Cerebral Artery

In supero lateral surface of brain functional lobes are Frontal Lobe. Parietal Lobe, Temporal Lobe, Occipital Lobe and submerged cortex are present. Larger area of supero lateral surface is supplied by middle cerebral artery which is one of the terminal branch of internal carotid artery. Motor area is the primary motor area 4. Pre motor area is Secondary motor area Supplimentary motor area 6 Affarent fibres from pre motor and supplimentary motor area are passing through association fibres. Primary motor area controls highly skilled movements of opposite half of the body. The centre for voluntary control of micturation and defaecation are located in the anterior part of paracentral lobule. Lesion of paracentral gyrus produces the loss of specific movements of opposite side of the body. Supplimentary motor area programmly the sequential motor function. Lesion causes unable to perform motor function, Loss of co-ordination in the movement of 2 limits. Lesion of primary motor and supplementary motor area result in spastic paralysis with exaggerated deep tendon reflex. Lesion of motor speech area 44 & 45 produces inability to speak what person think motor afhasia. Lesion of premotor cortex 6 writing centre. Frontal eye field area controls the conjugate movement of eye ball present in posterior part of middle frontal gyrus. Prefrontal controls depth of feeling and understanding. Sensory area is granular cortex. Sensory area 1, 2, 3, Secondary sensory area & Sensory associated area are present. Primary visual area, Secondary visual area, Occipital eye field area are present. Auditory area, Auditory associated area are present. Thrombosis of middle cerebral artery produces spastic hemiplegia and hemisensory loss except leg of the opposite side. If the left middle cerebral artery is involves there will be Aphasia. Cerebro vascular disease causes cerebral haemorrhage, Thrombosis and embolism. Spastic Hemisplegia of opposite side loss of ssensation of opposite side occurs. If retro lentiform part of internal capsule involves formation of hemiplegia. Circulus arteriosus or cicle of willis is an arterial arcade situated in the base of the brain in interpeduncular fossa. It is formed by anterior, middle and posterior cerebral artery. Perforating arteries which supply anterior limb of internal capsule. Central branches are 6 in numbers antero medial is the largest branches medial striate or recurrent artery of Heubner. Antero lateral are 2 groups. Largest is Lenticulo straiate or charcots artery of cerebral haemorrhage. Postero lateral & postero medial are present. Thrombosis of lateral striate of middle cerebral artery causes motor & sensory loss of most of Opposite side of body except lower limb. Hemiplegea is a common condition of upper motor Neuron paralysis. The M4 describes the branches of the middle cerebral artery that passes nearly all the convex surface of the cerebral hemisphere aside from the frontal pole and posterior rim using the functional branching approach to Anatomy, the middle cerebral artery generally arises as a single trunk of 14-16 mm length and a diameter of approximately 3 mm to 6 mm majority of cases supplied by superior & inferior division.