Final answer:
Left parietal lesions may cause impaired spatial awareness, aphasia, and decreased sensory processing, including difficulties with language and recognizing objects. These deficits are a result of damage to the brain's integration areas such as Broca's or Wernicke's areas and can disrupt various cognitive abilities.
Step-by-step explanation:
Characteristics of left parietal lesions can include various deficits such as impaired spatial awareness and neglect, difficulty with language comprehension, denoted as aphasia, and decreased sensory processing. Specifically, the parietal lobe is involved in integrating sensory information and has a role in spatial orientation and navigation. When it comes to aphasias, damage to the left hemisphere which houses important integration areas like Broca's or Wernicke's areas leads to notable language and speech dysfunctions. Aphasia can manifest in different forms, depending on the particular structures affected.
Other potential impacts of a left parietal lesion include praxis and gnosis, which encompass the ability to perform motor tasks and recognize objects through sensory information, respectively. Additionally, although not a classic symptom of a left parietal lesion, prosopagnosia or face blindness, is a sensory deficit that affects the ability to recognize faces and is associated with damage to specific brain areas involved in processing visual information.