First lumbrical canal communicates with
Thenar space communicates with first web space through first lumbrical canal.The midpalmar space communicates with medial 3 web spaces through medial 3 lumbrical canals.Reference: Textbook of anatomy upper limb and thorax, Vishram Singh, second edition, page no 154, 153
Adductor space
Midpalmar space
Thenar space
Hypothenar space
Upper limb