Facial Muscles in Phonetics

These flashcards cover key facial muscles relevant to speech production and their functions.

Orbicularis Oris (OO)

A muscle that performs sphincter-like actions, central to lip movements.

Buccinator Muscle

Works in coordination with the Orbicularis Oris to shape and tense the lips.

Risorius Muscle

Known as the 'laugh' muscle, it draws the sides of the mouth back.

Mentalis Muscle

Referred to as the 'pouting' muscle, it pulls the chin up to aid in pouting.

Levator Labii Superioris (LLS) Muscle

Raises the upper lip and originates from the lower orbit of the eyes.

Zygomaticus Major

Associated with the 'sincere' smile, raising the corners of the mouth.

Depressor Anguli Oris Muscle

Aids in frowning or pulling the upper lip downward.

Depressor Labii Inferioris Muscle

Lowers and spreads the lower lip.

Concentric Organization of OO

The OO is organized into concentric rings around the mouth, controlling lip shapes.

Feedback in Speech Production

Real-world speech processing relies on feedback from lips and face for optimal communication.

Visual and Tactile Information in Speech Perception

Visual cues enhance speech perception, especially in noisy environments.

Functionality of the OO Muscle

The OO can create different lip shapes for various phonetic requirements.

Marginal Part of the OO

Inner zone of the OO that produces rounded, unprotruded lips.

Peripheral Part of the OO

Outer zone of the OO that produces protruding lips.