Why can I feel a pulse on my wrist?

When I put my thumb on my radial pulse and push down and then my finger after it I can still feel a pulse even though I can closing the radial artery. Why is this? It does get much weaker but I can still feel it. Is this just the pulse coming from the ulnar artery? Is this a sign of aortic regurgitation? Or is this just something normal?

More Information

• Anatomy of the palmar branch of the ulnar nerve: application to ulnar and median nerve decompressive surgery. « Medicine JournalFeeds
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