触覚

• Reading: しょっかく
• Romaji: shokkaku
• Kanji breakdown: 触 (shoku/shok) — touch, contact | 覚 (kaku) — sense, perception
• Pronunciation: /ɕok.ka.kɯ/

Meaning

The sense of touch; tactile sense. Also: antenna or feeler of an insect or crustacean.

In neuroscience and physiology, 触覚 refers to the somatosensory system's detection of pressure, texture, temperature, and pain through skin receptors. In entomology, it refers to an insect's antennae. Contrasts with 視覚 (vision), 聴覚 (hearing), 嗅覚 (smell), and 味覚 (taste) as one of the five senses.

Examples

1. 皮膚の触覚受容器は、温度・圧力・痛みなどのさまざまな刺激を感知する。 Tactile receptors in the skin detect various stimuli such as temperature, pressure, and pain.
2. 視覚を失った人は、しばしば触覚や聴覚が著しく発達すると言われている。 It is said that people who have lost their sight often develop notably enhanced senses of touch and hearing.
3. 昆虫の触覚だけでなく、嗅覚センサーとしても機能することが近年の研究で示された。 Recent research has shown that insect antennae function not only as feelers but also as olfactory sensors.

Usage Guide

Context: physiology, neuroscience, entomology, sensory science

Tone: technical

Origin & History

Compound of 触 (shoku) meaning 'touch, contact' and 覚 (kaku) meaning 'sense, perception'. Formed by analogy with the other sensory terms (視覚, 聴覚, etc.) during Meiji-era translation of physiology.

Cultural Context

Era: Meiji–Modern

Generation: Students and medical professionals

Social background: Academic