CBIS Assessment and Diagnosis 2

Question 1

Which neuroimaging technique is most sensitive for detecting diffuse axonal injury (DAI) in the acute phase of TBI?

Accepted Answer

MRI with susceptibility-weighted imaging (SWI)

Answer

SWI MRI detects microhemorrhages and axonal shear injury far better than CT or standard MRI sequences.

Question 2

A patient scores a 3 on each component of the Glasgow Coma Scale (GCS). What does this total score indicate?

Accepted Answer

Severe TBI

Answer

A GCS score of 3 (the minimum possible) indicates severe TBI with no eye opening, no verbal response, and no motor response.

Question 3

When assessing post-traumatic amnesia (PTA), the Galveston Orientation and Amnesia Test (GOAT) considers a patient out of PTA at what minimum score?

Accepted Answer

75

Answer

A GOAT score of 75 or higher on two consecutive assessments is the standard criterion for emergence from PTA.

Question 4

Which cranial nerve is most commonly injured in basilar skull fractures involving the anterior fossa, leading to anosmia?

Accepted Answer

Cranial nerve I (olfactory)

Answer

The olfactory nerve (CN I) passes through the cribriform plate and is frequently sheared in anterior fossa fractures.

Question 5

The Rancho Los Amigos Levels of Cognitive Functioning Scale (LCFS) Level IV is best characterized by which behavior?

Accepted Answer

Confused and agitated responses to environment

Answer

LCFS Level IV is the 'confused-agitated' stage, where patients are in heightened arousal and may be combative.

(CBIS) Certified Brain Injury Specialist Practice Test