Vocal Anatomy Course

Lesson 1 • Overview of the Vocal System

Introduces the three subsystems of voice: respiration, phonation, and resonance. Provides the conceptual framework used throughout the entire course.

Lesson 2 • Planes and Directional Terminology

Covers anatomical planes, axes, and directional terms used to describe vocal structures. Ensures precise communication in clinical and academic contexts.

Lesson 3 • Skeletal Framework of the Neck

Examines the bony and cartilaginous scaffolding that supports vocal structures. Connects skeletal landmarks to palpation and clinical assessment.

Lesson 1 • Breath Flow and Subglottal Pressure

Explains how airflow rate and subglottal pressure interact to initiate and sustain phonation. Connects respiratory mechanics to pitch and loudness control.

Lesson 2 • Primary Muscles of Respiration

Identifies the diaphragm and intercostal muscles as the engines of inhalation and exhalation. Links muscle action to subglottal pressure generation.

Lesson 3 • Anatomy of the Thoracic Cavity

Examines the lungs, pleura, and thoracic cage as the primary air reservoir for voice. Establishes the structural basis for breath capacity and control.

Lesson 4 • Accessory Breathing Muscles

Covers secondary muscles that assist forced inhalation and exhalation during demanding vocal tasks. Explains how overuse of accessory muscles affects vocal efficiency.

Lesson 1 • Laryngeal Membranes and Ligaments

Maps the thyrohyoid, cricothyroid, and quadrangular membranes that stabilize and connect laryngeal cartilages. Explains how ligament tension limits and guides joint motion.

Lesson 2 • Epiglottis and Minor Cartilages

Covers the epiglottis, corniculate, and cuneiform cartilages and their roles in airway protection and resonance shaping. Connects epiglottic position to vocal tract acoustics.

Lesson 3 • Cricoid Cartilage and Cricothyroid Joint

Details the signet-ring shape of the cricoid and its articulation with the thyroid cartilage. Explains how cricothyroid joint rotation controls fundamental frequency.

Lesson 4 • Thyroid Cartilage in Depth

Analyzes the thyroid cartilage's laminae, horns, and notch as reference points for laryngeal movement. Connects thyroid tilt to vocal fold elongation.

Lesson 1 • Muscle Synergies and Register Control

Synthesizes how intrinsic muscles work in coordinated groups to produce distinct vocal registers. Prepares students to analyze muscle imbalance as a source of vocal dysfunction.

Lesson 2 • Lateral Cricoarytenoid and Interarytenoid Muscles

Covers the adductors responsible for closing the glottis during phonation and swallowing. Explains how incomplete adduction produces breathy voice quality.

Lesson 3 • Thyroarytenoid and Vocalis Muscles

Details the thyroarytenoid body and its medial vocalis portion as the primary mass of the vocal fold. Explains how vocalis contraction stiffens the fold body for chest voice.

Lesson 4 • Posterior Cricoarytenoid Muscle

Identifies the posterior cricoarytenoid as the sole vocal fold abductor and essential airway opener. Highlights its critical role in breathing and voice onset.

Lesson 1 • Infrahyoid Muscle Group

Examines the sternohyoid, sternothyroid, thyrohyoid, and omohyoid as laryngeal depressors. Explains how infrahyoid activation lowers laryngeal position for darker resonance.

Lesson 2 • Head, Neck, and Spinal Posture

Examines how cervical alignment and head position affect laryngeal muscle tension and airway geometry. Identifies postural habits that restrict vocal fold mobility.

Lesson 3 • Suprahyoid Muscle Group

Covers the digastric, mylohyoid, geniohyoid, and stylohyoid muscles that elevate the hyoid and larynx. Links suprahyoid tension to high larynx position and thinned resonance.

Lesson 4 • Whole-Body Posture and Breath Integration

Connects spinal alignment, pelvic position, and thoracic expansion to efficient breath support and laryngeal freedom. Synthesizes posture and respiration as an integrated vocal foundation.

Lesson 1 • Glottal Cycle Phases

Breaks down the opening, open, closing, and closed phases of a single glottal cycle. Links cycle symmetry and regularity to perceived voice quality and acoustic output.

Lesson 2 • Extracellular Matrix Components

Identifies collagen, elastin, and hyaluronic acid as the key matrix proteins that determine fold viscoelasticity. Explains how matrix changes underlie nodules, polyps, and scarring.

Lesson 3 • Mucosal Wave Mechanics

Explains the traveling wave motion of the vocal fold cover during phonation using the body-cover model. Connects wave amplitude and speed to perceived voice quality.

Lesson 4 • Layered Structure of the Vocal Fold

Describes the epithelium, lamina propria layers, and muscle as the five-layer model of the vocal fold. Establishes the tissue basis for the body-cover theory of vibration.

Lesson 1 • Nasal Cavity and Sinuses

Analyzes the contribution of nasal coupling and paranasal sinuses to vocal resonance and timbre. Distinguishes healthy nasal resonance from hypernasality and hyponasality.

Lesson 2 • Oral Cavity and Articulators

Covers the tongue, lips, jaw, and hard palate as articulators that reshape the oral resonating space. Links articulator position to formant frequency shifts and vowel identity.

Lesson 3 • Vocal Tract as an Acoustic Filter

Introduces the source-filter theory of voice production and the vocal tract's role as a resonating tube. Establishes the acoustic framework for all resonance discussions.

Lesson 4 • Pharyngeal Resonators

Examines the laryngopharynx, oropharynx, and nasopharynx as primary resonating chambers. Connects pharyngeal space and shape to warmth and projection in the voice.

Lesson 1 • Structural Vocal Pathologies

Identifies nodules, polyps, cysts, and Reinke's edema as benign structural lesions with distinct anatomical locations. Links lesion site to the specific layer of the vocal fold affected.

Lesson 2 • Principles of Clinical Intervention

Surveys behavioral, surgical, and pharmacological intervention rationales grounded in vocal anatomy. Prepares students to reason about treatment selection using anatomical evidence.

Lesson 3 • Central and Peripheral Motor Control

Explains cortical, subcortical, and cerebellar contributions to voluntary and automatic voice control. Distinguishes upper and lower motor neuron lesion effects on voice.

Lesson 4 • Neurogenic Voice Disorders

Covers vocal fold paralysis, spasmodic dysphonia, and essential tremor as neurogenic conditions with anatomical bases. Explains how nerve lesion location predicts the pattern of vocal impairment.