Myerson's sign

Myerson's sign or glabellar tap sign is a medical condition where a patient is unable to resist blinking when tapped on the glabella, the area above the nose and between the eyebrows. It is often referred to as the glabellar reflex. It is often an early symptom of Parkinson's disease, but can also be seen in early dementia as well as other progressive neurologic illness.^[1]^[2] It is named for Abraham Myerson, an American neurologist.

References

↑ Conley, Scott; Kirchner, Jeffrey (15 July 1999). "Parkinson's disease--the shaking palsy Underlying factors, diagnostic considerations, and clinical course". Postgraduate Medicine 106 (1). doi:10.3810/pgm.1999.07.604. PMID 10418573.
↑ Sunohara, N; Tomi, H; Satoyoshi, E; Tachibana, S (Oct 1985). "Glabella tap sign. Is it due to a lack of R2-habituation?". Journal of the neurological sciences 70 (3): 257–67. PMID 4056821.

Eponymous medical signs – nervous system

CNS

Head, general	Battle's sign Broca aphasia Kernig's sign Macewen's sign Myerson's sign Stroop test Wada test Dix-Hallpike test Hirano body

Multiple sclerosis	Dawson's fingers Lhermitte's sign Charcot's neurologic triad Uhthoff's phenomenon

Other	Romberg's test increased intracranial pressure Cushing's triad Miller Fisher test

PNS

Reflexes of extremities/
corticospinal tract

Combination	Jendrassik maneuver

Lower limb	Babinski sign Chaddock reflex Oppenheim's sign Westphal's sign

Upper limb	Hoffmann's sign

Other torso/limbs

Upper limb	Froment's sign carpal tunnel syndrome Tinel sign Phalen maneuver

Lower limb	Abadie's sign of tabes dorsalis Gowers' sign Hoover's sign Lasègue's sign Trendelenburg's sign

Torso	Beevor's sign

General	Todd's paresis Jolly's test

Mental/behavioral

Russell's sign

Index of the central nervous system

Description	Anatomy meninges cortex association fibers commissural fibers lateral ventricles basal ganglia diencephalon mesencephalon pons cerebellum medulla spinal cord tracts Physiology neutrotransmission enzymes intermediates Development

Disease	Cerebral palsy Meningitis Demyelinating diseases Seizures and epilepsy Headache Stroke Sleep Congenital Injury Neoplasms and cancer Other paralytic syndromes ALS Symptoms and signs head and neck eponymous lesions Tests CSF

Treatment	Procedures Drugs general anesthetics analgesics addiction epilepsy cholinergics migraine Parkinson's vertigo other

Index of the peripheral nervous system

Description	Anatomy Nerves cranial trigeminal cervical brachial lumbosacral plexus somatosensory spinal autonomic Physiology reflexes proteins neurotransmitters transporters Development neurotrophins

Disease	Autonomic Congenital Injury Neoplasms and cancer Other Symptoms and signs eponymous

Treatment	Procedures Local anesthetics

Index of psychology and psychiatry

Description	Mental processes

Disorders	Mental and behavioral ADHD OCD Tourette's Mood Developmental pervasive dyslexia and specific Substance-related alcohol Emotional and behavioral Symptoms and signs eponymous Evaluation and testing

Treatment	Psychotherapy CBT Drugs depression antipsychotics anxiety dementia hypnotics and sedatives psychostimulants, ADHD and nootropics