Q Fever

Infectious disease caused by Coxiella burnetii.

Pathophysiology

Q Wave

Initial downward deflection in the QRS complex on ECG.

ECG

Q10 Effect

Temperature’s effect on reaction rate (metabolic processes).

Physiology

QCM (Quartz Crystal Microbalance)

Instrument measuring tiny mass changes.

Physics

Quadrant (Abdominal)

One of four sections used in clinical exams.

Anatomy

Quadratic Equation

Used in biomechanics/physics for trajectory.

Physics / Biomechanics

Quadratus Femoris

Hip muscle aiding external rotation.

Anatomy

Quadratus Lumborum

Deep back muscle aiding trunk stability.

Anatomy

Quadratus Plantae

Foot muscle assisting toe flexion.

Anatomy

Quadriceps

Four muscles in front of thigh responsible for knee extension.

Anatomy / Strength & Conditioning

Quadriceps Angle Correction

Intervention to reduce patellofemoral stress.

Sport Injury

Quadriceps Fatigue Index

Indicator of quadriceps endurance decline.

Exercise Testing

Quadriceps Femoris Strain

Injury to quadriceps muscles.

Sport Injury

Quadriceps Recruitment Pattern

EMG analysis of quadriceps activation.

Motion Analysis

Quadriceps Strength Test

Assessment of quadriceps force output.

Exercise Testing

Quadriceps Tendinopathy

Overuse injury of quadriceps tendon.

Sport Injury

Quadriceps Tendon

Connective tissue linking quadriceps to patella.

Anatomy

Quadriceps-Hamstring Ratio

Balance measure of knee stability.

Exercise Testing

Quadriplegia

Paralysis of all four limbs due to spinal cord injury.

Pathophysiology

Quadruped Position

Exercise posture on hands and knees.

Exercise Prescription

Quadrupedal Gait

Locomotion using all four limbs.

Biomechanics

Qualitative Research

Research focusing on non-numerical data and meanings.

Sociology

Quality Control

Ensuring reliability and accuracy in testing.

Research

Quality of Life (QoL)

Overall well-being and life satisfaction measure.

Sociology / Psychology

Quality-Adjusted Life Year (QALY)

Measure combining life expectancy and quality.

Medicine / Sociology

Quantal Analysis

Measurement of synaptic transmission.

Neuroscience

Quantal Release

Synaptic release of neurotransmitter packets.

Neuroscience

Quantifier Effect

Influence of measurement scales in psychology.

Psychology

Quantitative EEG (qEEG)

Brain mapping technique analyzing electrical activity.

Neuroscience

Quantitative Fluoroscopy

Imaging technique for joint kinematics.

Motion Analysis

Quantitative Research

Research using numerical data and statistics.

Sociology

Quantitative Sensory Testing (QST)

Method assessing nerve sensitivity.

Neurology

Quantitative Trait Loci (QTL)

Genomic regions associated with complex traits.

Genetics

Quantization

Discretization of physical values.

Physics

Quantum Dot

Nanoparticle with optical/electronic properties.

Physics

Quantum Entanglement

Physical phenomenon where particles remain connected.

Physics

Quantum Mechanics

Physics theory explaining subatomic behavior.

Physics

Quantum Tunneling

Subatomic particles crossing barriers.

Physics

Quarantine

Isolation to prevent spread of infection.

Pathophysiology

Quark

Fundamental particle in physics.

Physics

Quasi-Equilibrium

Approximation method in physiology/physics.

Physiology

Quasi-Experimental Design

Research method lacking full randomization.

Sociology / Psychology

Quasi-Newton Method

Computational technique used in modeling.

Physics / Biomechanics

Quasi-Periodic Oscillations

Repeated but irregular cycles in biology/physics.

Physiology / Physics

Quasi-Static Equilibrium

State with negligible acceleration.

Physics

Quasi-Static Motion

Slow, controlled biomechanical movement.

Biomechanics

Quasiparticle

Collective excitation in physics.

Physics

Quasistatic Loading

Gradual load applied to tissues/materials.

Biomechanics

Quaternary Ammonium Compounds

Antimicrobial chemicals.

Chemistry

Quaternary Prevention

Preventing overmedicalization of patients.

Sociology / Medicine

Quaternary Protein Structure

Complex of multiple polypeptide subunits.

Biochemistry

Quaternary Structure (Protein)

Level of protein structure formed by multiple polypeptides.

Chemistry / Biology

Qubit

Basic unit of quantum information.

Physics

Qubit State Collapse

Fundamental principle in quantum measurement.

Physics

Quench Recovery

Reversal of superconducting magnet failure.

Physics

Quenched Flow Analysis

Lab technique to stop reactions quickly.

Chemistry

Quenching

Process of cooling to halt chemical reactions.

Chemistry

Quenching Antibody

Antibody used to stop biological reactions.

Biology

Quercetin

Plant flavonoid with antioxidant properties.

Nutrition

Quercetin Supplementation

Nutritional strategy for antioxidant effects.

Nutrition

Quercus Alba

Oak species studied in phytochemistry.

Biology

Quercus Extract

Plant extract studied for health benefits.

Nutrition

Questrian Gait

Abnormal gait due to hip abductor weakness.

Biomechanics

Quetelet Index (BMI)

Formula for body mass index (weight/height²).

Nutrition / Physiology

Quetelet’s Law

Relationship between body weight and height.

Sociology / Physiology

Quick Ratio

Measure of hydration status (clinical).

Physiology

Quickening

First fetal movements felt by mother.

Physiology

Quickness

Ability to react and move rapidly.

Strength & Conditioning

Quiescence

State of cellular dormancy or inactivity.

Biology

Quill Pigmentation

Rare feather/hair color phenomenon.

Biology

Quillaja Extract

Natural surfactant from plants.

Nutrition

Quinacrine

Drug used in malaria treatment.

Medicine

Quinazoline

Compound class used in pharmaceuticals.

Chemistry

Quinidine

Antiarrhythmic drug used in heart rhythm disorders.

Medicine

Quinidine Sulfate

Medication for heart arrhythmias.

Medicine

Quinine

Antimalarial compound from cinchona bark.

Medicine

Quinine Test

Diagnostic test for malaria sensitivity.

Medicine

Quinolinic Acid

Neurotoxic metabolite involved in neurological disease.

Pathophysiology

Quinolinic Encephalopathy

Brain injury linked to quinolinic acid.

Pathophysiology

Quinolones

Class of antibiotics affecting DNA replication.

Medicine

Quinone

Aromatic compound involved in electron transfer.

Chemistry

Quinone Reductase

Enzyme involved in detoxification.

Biochemistry

Quinsy (Peritonsillar Abscess)

Complication of tonsillitis with abscess formation.

Pathophysiology

Quinsy Position

Classic posture in severe throat infection.

Medicine

Quintuple Reflex

Combined reflex arc activation test.

Physiology

Quinuclidine

Organic compound in medicinal chemistry.

Chemistry

Quixotic Fatigue

Extreme fatigue after prolonged stress/exercise.

Exercise Physiology

Quixotic Reflex

Rarely observed exaggerated reflex response.

Neurology

Quorum

Minimum group size for decision-making.

Sociology

Quorum Detection

Bacterial sensing of population density.

Biology

Quorum Inhibition

Blocking bacterial quorum sensing.

Biology

Quorum Sensing

Bacterial communication via chemical signaling.

Biology

Quorum Threshold

Minimum signal level in cell communication.

Biology

Quota Sampling

Research sampling based on population subgroups.

Sociology