|The Primary Somatosensory area (S1) reports about proprioceptive and cutaneous events, such as the position of a limb, and any contact with objects.|
|The pre-motor cortex utilises all these pieces of information about the position of the body in 3-dimenional space relative to external objects, and organises appropriate movements. In addition, the frontal cortex is concerned with conscious thought, attention, initative and decision-making.|
|In order to organise complex movements the pre-motor areas have to be connected with all these areas, using bundles of subcortical association fibres, and connections through the basal ganglia and thalamus.|
Areas of association cortex, including the PPC, commuicate with the Pre-motor (lateral) and Supplementary Motor Cortex (medial), as well as other sites in the frontal lobe.
The arcuate fasciculus is a long band of association fibres concerned with relaying auditory messages (concerned with understanding of the spoken word; in the temporal lobe) to the motor areas concerned with speech, in the frontal lobe.
|Motor skills are learned throughout life, probably within the cerebellum, and this structure provides feedback - an error signal that allows the motor cortex to adjust movements and provide greater precision.|
|Finally, the sequence of movements organised by these complex circuits is executed by the motor cortex and the corticospinal tract which carries motor commands to the alpha motoneurones and therefore the musculature.|