This establishes limited somatotopic
structure of fascicles.
One study has characterized separate somatotopic
representation of the larynx in the human motor cortex10.
In contrast, there are also studies showing that activation of cortical motor areas that have somatotopic
organization with action-related language does not follow somatotopic
organisation of the human insula to painful heat studied with high resolution functional imaging.
Fink et al., "Action observation activates premotor and parietal areas in a somatotopic
manner: An fMRI study," European Journal of Neuroscience, vol.
Dorsal horn neurons send noxious signals supraspinally to subcortical nuclei involved in the sensory-discriminatory aspects of pain perception, such as the thalamus, which, in turn, sends projections to cortical nuclei such as somatosensory cortex, informing the organism of the somatotopic
origin of the noxious stimulus and pain intensity.
The array was centred on the central sulcus alternatively in two different positions corresponding to the cortical somatotopic
representation of the upper limb and of the face.
Hammwek et al., "Somatotopic
mapping of the human primary motor cortex with functional magnetic resonance imaging," Neurology, vol.
Zanette, "Abnormal somatotopic
arrangement of sensorimotor interactions in dystonic patients," Brain, vol.
N9 notch is generated by the brachial plexus, and N13 by postganglionic fibers of the first sensory neuron, that is, posterior radix and/or dorsal column of the cervical spinal cord, while N20 originates in the primary sensory cortex of the contralateral parietal lobe, at the location of somatotopic
representation of the hand.
Cutaneomotor integration in human hand motor areas: somatotopic
effect and interaction of afferents.