The Revised Neurobehavioral Severity Scale (NSS-R) for Rodents

Area of Science:

• Neuroscience
• Behavioral Science
• Traumatic Brain Injury Research

Background:

• Motor and sensory deficits are common sequelae of traumatic brain injury (TBI).
• Rodent models are crucial for understanding TBI outcomes, necessitating reliable behavioral assessments.
• Existing observational scales for TBI functionality can be complicated by injury heterogeneity.

Purpose of the Study:

• To introduce and validate the Revised Neurobehavioral Severity Scale (NSS-R) as a sensitive and reproducible method for evaluating rodent TBI.
• To provide an objective and efficient behavioral assessment tool for translational TBI research.

Main Methods:

• The Revised Neurobehavioral Severity Scale (NSS-R) employs a standardized sequence of 10 specific tests.
• Tests assess balance, motor coordination, and sensorimotor reflexes including landing, tail raise, dragging, and various reflexes (righting, ear, eye, sound, pinch).
• The scale is designed for efficient, objective quantification of behavioral deficits.

Main Results:

• The NSS-R demonstrated reliability in differentiating between brain-injured and non-brain-injured rodents.
• The scale proved effective across various rodent TBI models.
• The sequential ordering of tasks minimizes interference and enhances assessment efficiency.

Conclusions:

• The NSS-R is a reliable, sensitive, and reproducible behavioral assessment tool for rodent TBI research.
• This scale facilitates objective quantification of neurological deficits, supporting translational research efforts.
• The NSS-R aids in standardizing the evaluation of functional outcomes following TBI in preclinical models.