TBI and Right Hemisphere Damage: Cognitive-Communication on the Praxis

Cognitive-communication disorders — traumatic brain injury (TBI) and right hemisphere damage (RHD) — are where Praxis 5331 candidates who studied only aphasia get burned. These clients often have intact grammar and word retrieval but can't hold a conversation, follow a multi-step task, or recognize that anything is wrong.

Right hemisphere damage: the profile

• Pragmatic deficits — poor turn-taking, tangential output, reduced eye contact, flat prosody (aprosodia).
• Literal interpretation — trouble with metaphor, sarcasm, humor, and inference.
• Left neglect — misses the left side of a page, plate, or body. Reading restarts mid-line.
• Anosognosia — reduced awareness of deficits, which undermines carryover.
• Discourse deficits — verbose, poorly organized narratives that miss the main point.
• Impaired facial affect recognition and visuospatial reasoning.

Naming and syntax are typically preserved. If a case describes fluent, grammatical speech that is socially off-target with left-sided inattention, the answer is RHD — not Wernicke's aphasia.

TBI: the profile

TBI produces diffuse axonal injury plus focal contusions, most often in frontal and temporal poles. Expect executive function deficits:

• Attention (sustained, selective, alternating, divided)
• Working memory and new learning
• Initiation, inhibition, and impulsivity
• Planning, organization, and self-monitoring
• Reduced processing speed and mental fatigue
• Post-traumatic amnesia in the acute phase

Rancho Los Amigos levels

Know at least the shape of the scale — items ask what treatment is appropriate at a given level.

• I–III (no response → localized response): sensory stimulation, orientation, environmental control, family education.
• IV–VI (confused/agitated → confused-appropriate): structure, routine, reduced stimulation, memory logs, redirection. Do not reason with an agitated Level IV patient.
• VII–VIII (automatic-appropriate → purposeful): community reintegration, metacognitive strategies, vocational and academic reentry.

Assessment tools worth recognizing

• Glasgow Coma Scale — acute severity (eye, verbal, motor; 3–15).
• Ranchos Los Amigos — cognitive recovery stage.
• RIPA-2 — Ross Information Processing Assessment for cognitive-linguistic skills.
• MIRBI-2 and the RHD-focused RICE protocol for right hemisphere function.
• Line bisection and cancellation tasks for neglect.
• Functional/ecological measures — often the best answer, because standardized scores frequently miss real-world breakdown.

Treatment principles

• Errorless learning and spaced retrieval for severe memory impairment — see also dementia management, which uses the same tools.
• External aids — memory notebooks, smartphone alarms, checklists — before internal strategies when awareness is low.
• Metacognitive strategy instruction (Goal–Plan–Do– Review) once awareness supports it.
• Awareness training with prediction-versus-performance tasks for anosognosia.
• Neglect — anchoring cues on the left margin, visual scanning training, environmental arrangement.
• Context-sensitive, functional targets and heavy family/caregiver training. Decontextualized worksheet drills are a common wrong answer.

Fast differential for the exam

• Left hemisphere stroke → language impairment (aphasia), often with apraxia of speech.
• Right hemisphere stroke → pragmatics, inference, neglect, awareness.
• TBI → executive function and attention, diffuse and variable.
• Dementia → progressive decline across domains, memory-led in Alzheimer's type.

This cluster is worth explicit review time because it spans assessment and intervention content areas. Drill it in our cognitive- communication question set and confirm your timing on a full practice test.