The interossei are supplied by

Deep palmar arch is formed mainly by terminal pa of the radial aery and is completed medially at the base of fifth metacarpal bone by the deep palmar branch of the ulnar aery. Superficial palmar branch of radial aery joins with the ulnar aery laterally to form a superficial palmar arch which supplies the digits. Deep palmar branch of ulnar aery joins with the radial aery to form deep palmar arch and supplies interossei muscles. BD Chaurasia 7th edition Page no: 126,127