Greetings and welcome!
There are, indeed, layers of spiritual and esoteric meaning in the crown of thorns and it does have a correspondence with the crown star (or “chakra”), as well as to the brow star. These two interior stars relate directly to an esoteric understanding of the mystery of the crucifixion among Gnostics; hence, the uplifting of the serpent power to the brow or crown, and the repose or cessation of the serpent power through which Supernal or Messianic Consciousness dawns.
If and when we receive the Holy Light from above, and the serpent power is awakened and uplifted, the center on top of the head is also the point of focus for the transference of consciousness into the body of light; hence and esoteric understanding of the resurrection.
I might add that the crown of thorns is also taken to represent the need to bring mental consciousness into cessation, or all of our thought and thinking, to allow the dawn of Supernal or Supramental Consciousness.
Along with esoteric associations such as these, with all of the symbolism of the crucifixion there are teachings of the rite of ransom, or great gesture; taking on the sorrow and suffering of others, and imparting to them one’s peace and joy – an active energetic exchange seeking to deliver beings from their suffering.
What such a symbol means arising in our meditations is difficult to say; such things must be taken into prayer and we need to inquire of the Spirit. Perhaps it indicates an opening of your crown star, but generally there are other energetic experiences associated with that. It could indicate many things, or nothing. As an example, there are influxes of great spiritual powers at this time, and there is an incredible pressure and stress in the subtle psychic atmosphere at this time, and such an experience in meditation could be a mental and vital interpretation of this; on the other hand, as another example, it could also be a sign that you are about to be touched by the Holy Spirit, or receive an influx of the Holy Light from above. Some images that arise in meditation can also be like passing thoughts, so also some sensations are like this, and those don’t carry deep meaning – they are just natural phenomenon of the mind as we practice meditation.
Perceiving such a thing, though, I’d be inclined to pray seeking a greater influx of the Holy Light from above, or, seeking a greater generation of the Sacred Heart, the love and compassion of Christ; in other words, it would inspire prayers, corresponding with the symbolism according to my interpretation and understanding of it. In this way, regardless of the nature of this arising in meditation, so there can be a spiritual empowerment in it, and deeper meaning can be drawn from it.
These were a few quick thoughts I was inclined to share.
Good to see you here; you will be in my prayers.
Peace be with you!
Ecclesia Pistis Sophia