Final answer:
The first egocentric map overlap is most likely to occur in the prefrontal cortex, which is involved in higher-order processing and integration of different types of sensory information for planning and decision-making functions.
Step-by-step explanation:
The egocentric map informs about the body's spatial relation to the environment. Cortical regions are involved in integrating sensory information to help form this egocentric map. When considering the options given in the question, it's important to connect each area to its primary function in the brain. For instance, Area 17 as described by Brodmann is the primary visual cortex or V1, and is responsible for processing visual information. V1 is closely linked with functions pertinent to egocentric mapping as it processes visual information which is inherently spatial. However, the prefrontal cortex is widely acknowledged for its role in integrating various types of sensory data, planning, decision making, and moderating social behavior. Adjacent to the premotor and primary motor cortices is the Broca's area, essential for speech production. Understanding language, both from another person and the language a person generates himself or herself, is associated with Wernicke's area.
For the first egocentric map overlap to occur involving integration of different types of sensory information, it would most likely be in an area associated with higher-order processing, such as the prefrontal cortex, rather than just the primary reception areas such as V1, Broca's, or Wernicke's areas.