Final answer:
The SVa modality of the Nervus Intermedius (CN7) relates to sensory and visceral-afferent functions, such as taste sensation and salivation.
Step-by-step explanation:
The SVa modality of the Nervus Intermedius (part of the Facial Nerve or CN7) typically refers to its sensory (S) and visceral-afferent (Va) functions. This component of CN7 is involved with taste sensation from the anterior two-thirds of the tongue and carries parasympathetic fibers to the salivary glands, assisting in functions such as salivation. The cranial nerve exam assesses various aspects of nerve function, including the SVa modalities, offering insights into potential damage to specific regions of the brain stem.