I have been meditating quite often, and I sometimes experience a sensation where my limbs feel missing or displaced. I understand that this is fairly common during meditation.

However, right now, I'm practising a focused meditation where I relax my body, lie down or recline, and focus on something. In this case, I'm focusing on the sound of a fan.

As I focus on the fan, my external body gradually becomes deeply relaxed. But then my awareness seems to move a little deeper inward. I begin to notice my breathing becoming very slow, almost imperceptible. It feels shallow, as though I'm barely breathing or not breathing at all.

At this point, I also become aware of my heartbeat, and it seems to beat faster. However, when I come out of meditation, I realise that my heartbeat is actually quite normal, perhaps even slower than when I'm fully awake.…