Also called: Memory loop · Loop of recollection

Where on the hand: In the middle of the palm near the end of the head line, in the ridge field between the plain of Mars and Upper (Outer) Mars. Some sources instead describe a memory loop running from the Mount of Jupiter toward the Mount of Venus, and a further 'loop of memories' between the heart and head lines.

What it looks like: A loop of ridges lying across the central plain of the palm, its head pointing toward the percussion.

Read as unusual retentiveness — a long, accurate, sometimes photographic memory. The same practitioners add a warning: what is retained is not always released, so ideas and grievances can become fixed or obsessive.

Read with care: Sources disagree openly about where this loop sits — mid-palm, Jupiter-to-Venus, or between the heart and head lines — which is a sign that the 'memory loop' is a modern coinage rather than a settled tradition.