• On the top of the head is a Chakra - Sahasradala or the thousand-petalled lotus. There is a Chakra in the middle of the forehead between the eyebrows and one in the heart-centre. The region between the navel and head constitutes the mental field. From navel downward extending till the terminus of the spinal chord, mūlādhāra, is the seat of the vital.

    Sri Aurobindo: On the top of the head is a Chakra - Sahasradala or the thousand-petalled lotus. There is a Chakra in the middle of the forehead between the eyebrows and one in the heart-centre. The region between the navel and head constitutes the mental field. From navel downward extending till the terminus of the spinal chord, mūlādhāra, is the seat of the vital.
    Source: overmanfoundation.wordpress.com