Structures passing through foramen spinosum is:
Accessory meningeal artery
Middle meningeal artery
Mandibular nerve
Maxillary nerve
The foramen spinosum is situated posterolateral to foramen ovale in the lateral part of middle cranial fossa.
Structures passing through the foramen spinosum:

Middle meningeal artery.
Meningeal branch of mandibular nerve or Nervus spinosus.
Middle meningeal vein - posterior trunk.