Page 370 - Clinical Anatomy

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The brain 355

Fig. 249◊The long ascending pathways of the dorsal columns (yellow lines) and
spinothalamic tracts (red lines).

These somatic afferents are relayed from the thalamus, through the pos-
terior limb of the internal capsule (Fig. 248) to the somatic sensory cortex of
the postcentral gyrus. In the internal capsule the fibres are arranged in the
sequence ‘face, arm, trunk and leg’ from before backwards, and this segre-
gation persists in the sensory cortex, where the leg is represented on the