hyperexcitability

IPA/ˌhaɪ.pər.ɪk.saɪ.təˈbɪl.ə.ti/
IPA/ˌhaɪ.pɚ.ɪk.saɪ.t̬əˈbɪl.ə.t̬i/

hyperexcitability — noun

1. a medical condition in which nerve cells or muscle fibres respond much more stro

1.nounC2
Definition

a medical condition in which nerve cells or muscle fibres respond much more strongly than usual to normal signals such as touch, sound, or electrical messages — for example, a muscle that twitches at even a light touch, or brain cells that fire too easily when a person hears a sudden noise

Example

After the accident, Yasmin's left arm muscles showed hyperexcitability, twitching even at a light touch.

hyperexcitability + of + body part (muscles)

Doctors found hyperexcitability of nerve cells in Haruto's brain, causing strong reactions to sound.

Common collocations
  • neuronal hyperexcitability
  • cortical hyperexcitability
  • muscle hyperexcitability
  • hyperexcitability of nerve cells
  • reduce hyperexcitability
  • cause hyperexcitability
Synonyms
  • overexcitability

    Less technical and sometimes used for emotional states; hyperexcitability is specifically physiological and clinical

  • hypersensitivity

    Broader term covering allergies and sensory sensitivity, not limited to nerve/muscle response

  • hyperirritability

    Closest medical synonym, often used interchangeably in neurology for nerve-tissue over-response

Antonyms
  • hypoexcitability

    The opposite state where nerve cells or muscles respond less than normally to stimuli

Grammar Patterns

hyperexcitability + of + affected tissue/system

Usage Note

Almost exclusively used in medical and scientific writing, not in casual conversation. The word is followed by 'of' to specify the affected tissue ('hyperexcitability of nerve cells') or by 'in' to specify the body area ('hyperexcitability in the spinal cord').

Common Mistakes

I felt hyperexcitability before my job interview.
The patient's muscle hyperexcitability was caused by a nerve disorder.
Hyperexcitability is a clinical/physiological state, not a synonym for everyday nervousness or excitement.

Word family

Synonym discussion

Sense: noun/1

While all three words describe an abnormally strong response to stimulation, hyperexcitability is the most precise clinical term for nerve or muscle tissue that responds too readily to signals such as touch, sound, or electrical impulses. Overexcitability can refer to the same physiological state but is less technical and often used for emotional or behavioural contexts (e.g. 'the dog's overexcitability at the doorbell'). Hypersensitivity is broader and covers allergies, skin sensitivity, and emotional reactivity as well as nerve response. Hyperirritability is the closest medical synonym and is used interchangeably with hyperexcitability in neurology, though hyperirritability sometimes implies a more erratic or unpredictable response. For example, a neurologist would write about 'cortical hyperexcitability' in epilepsy, while a patient might describe 'skin hypersensitivity' after a sunburn.

overexcitabilityhypersensitivity ↗hyperirritability ↗

Common collocations

Nouns

  • nerve cells
  • nerve fibres
  • muscles
  • spinal cord
  • brain tissue

Prepositions

Etymology

GreekLatinEnglish

Formed from the prefix 'hyper-' (from Greek huper, meaning 'over' or 'beyond') and 'excitability' (from Latin excitare, meaning 'to call forth' or 'to rouse'). The term entered medical English in the late 19th century as neurology advanced, describing the condition where nerve or muscle tissue responds too strongly to stimuli.

First known use

1870

1870, in the meaning defined above