NBCE SPEC key terms

A model describing a vertebral motion segment as having biomechanical, neural, and soft-tissue components that together alter segmental mobility and nerve function; used to frame chiropractic diagnosis and rationale for adjustive care.

A specific, controlled, high-velocity low-amplitude thrust applied to a joint to restore or improve motion; distinguished from general mobilization by its speed, directionality, and therapeutic intent.

Passive joint movement applied at low velocity, within or at the limit of the available range, without a thrust; used to reduce pain and improve mobility when high-velocity manipulation is not indicated.

The audible pop sometimes heard during joint manipulation, produced by rapid pressure change and gas release within the joint capsule; its presence is not required for a clinically successful adjustment.

The small accessory motion available at a joint that cannot be produced voluntarily; assessed passively to identify restriction and used to guide the direction and amplitude of manipulative technique.

The quality of resistance felt by the examiner at the limit of passive joint range; described as normal, springy, hard, or empty, it helps distinguish capsular, bony, muscular, and protective restrictions.

Altered motion or mechanics at a single spinal or extremity level, identified by palpation, motion testing, and provocation; a descriptive finding rather than a statement of tissue pathology.

Manual assessment of the quantity and quality of movement between adjacent vertebrae or joint surfaces; used to locate hypomobile or hypermobile segments before and after treatment.

The functional unit formed by two adjacent vertebrae, their intervertebral disc, facet joints, and connecting ligaments; the basic biomechanical unit considered in spinal diagnosis and technique.

A fibrocartilaginous structure between vertebral bodies, composed of a hydrated nucleus pulposus and a layered annulus fibrosus, that transmits load and permits spinal motion; subject to degeneration, bulge, and herniation.

Signs and symptoms arising from irritation or compression of a spinal nerve root, typically producing dermatomal sensory change, myotomal weakness, and diminished reflex in a specific distribution.

The area of skin supplied by sensory fibers of a single spinal nerve root; mapped by level and used to localize a suspected nerve root lesion during neurologic examination.

The group of skeletal muscles innervated by motor fibers of a single spinal nerve root; tested by resisted contraction to detect level-specific motor weakness.

An involuntary muscle contraction elicited by tapping its tendon, graded on a standard scale; asymmetry or loss helps localize a lesion in the reflex arc or its nerve root.

Damage to motor pathways above the anterior horn cell, producing spasticity, hyperreflexia, and an extensor plantar response; distinguished from lower motor neuron findings such as flaccidity and atrophy.

Injury to the anterior horn cell or its peripheral axon, causing flaccid weakness, atrophy, fasciculations, and reduced reflexes in the affected muscles.

A provocation maneuver in which the supine patient's extended leg is raised; reproduction of leg pain at a limited angle suggests nerve root or sciatic tract irritation, often from disc pathology.

A clinical finding or history feature suggesting serious pathology such as fracture, infection, tumor, or cauda equina syndrome; its presence prompts imaging, referral, or modification of care.

Compression of the lumbar nerve roots below the cord, producing saddle anesthesia, bladder or bowel dysfunction, and bilateral leg weakness; a surgical emergency requiring immediate referral.

A condition or circumstance in which a given procedure should not be performed because it risks harm; classified as absolute when never appropriate and relative when risk must be weighed against benefit.

The patient's voluntary agreement to care after receiving and understanding information about the diagnosis, proposed treatment, expected benefits, material risks, alternatives, and consequences of declining.

The legally defined range of services a licensed practitioner may perform, set by statute and board rules; exceeding it exposes the clinician to disciplinary action and civil liability.

The degree of skill and judgment that a reasonably prudent practitioner with similar training would exercise in comparable circumstances; the benchmark against which negligence is judged.

Professional negligence established by four elements: a duty of care owed to the patient, a breach of that duty, harm proximately caused by the breach, and resulting damages.

The required period for keeping patient charts and related documents as defined by state law and payer contracts; adequate records support continuity of care and provide a legal defense.

Impaired or altered function of related components of the somatic system, including skeletal, arthrodial, and myofascial structures and their vascular and neural elements; identified by tenderness, asymmetry, restricted motion, and tissue texture change.

A hyperirritable spot within a taut band of skeletal muscle that is tender to compression and may refer pain in a characteristic pattern; distinguished from nerve root pain by its muscular location and referral behavior.

A manual technique applying sustained, low-load stretch to fascial and muscular tissue to restore mobility and reduce pain; often combined with other soft-tissue methods before joint adjustment.

The extent of movement available at a joint, measured actively by the patient or passively by the examiner and expressed in degrees; compared with expected norms and the contralateral side.

The sequence from initial contact of one limb to the next contact of the same limb, divided into stance and swing phases; abnormalities help localize neurologic, muscular, or joint dysfunction.

The vascular and cellular response to injury or infection, marked by redness, heat, swelling, pain, and loss of function; a normal healing process that becomes problematic when excessive or chronic.

Pain arising from activation of nociceptors in somatic or visceral tissue by mechanical, thermal, or chemical stimuli; typically described as aching or sharp and localized to the injured area.

Pain caused by a lesion or disease of the somatosensory nervous system, often described as burning, shooting, or electric and accompanied by altered sensation in a nerve distribution.

Pain perceived at a site distant from its source, as with visceral or myofascial referral; its pattern follows embryologic or segmental relationships rather than a single peripheral nerve.

The expected course and outcome of a condition based on its nature, the patient's characteristics, and response to care; used to set treatment frequency, goals, and expected duration.

A documented schedule of care specifying goals, techniques, frequency, duration, and criteria for re-evaluation or discharge, developed from the diagnosis and revised as the patient's status changes.

A validated instrument or objective test used to quantify a patient's status and change over time, such as a pain scale or region-specific disability questionnaire; supports documentation and treatment decisions.