Anatomy & Physiology Articulatory System

Questions and Answers

What is the function of the articulatory system?

Serves as filter for the phonatory source to shape the sounds of speech.

What are the moveable articulators?

Lips, mandible, velum, tongue, cheeks, fauces, pharynx, larynx.

What are the immoveable articulators?

Alveolar ridge of maxillae, hard palate, teeth.

What is the source-filter theory of vowel production?

Fant's theory that the voiced signal arising from the vocal folds passes through the filter of the vocal tract, where it is shaped into the sounds of speech. Signup and view all the answers

What components make up the nasal septum?

Vomer, perpendicular plate of ethmoid, septal cartilage. Signup and view all the answers

What bone is continuous with the nasal septum and the braincase?

Ethmoid. Signup and view all the answers

What structures serve to heat and humidify the air as it enters the body through the nose?

Nasal conchae or turbinates. Signup and view all the answers

What bones contribute to the hard palate?

Palatine and maxillae. Signup and view all the answers

What are the components of the hard palate?

Palatine processes of maxillae and horizontal plates of palatine bones. Signup and view all the answers

What is the major muscle of the velum?

Levator veli palatini. Signup and view all the answers

The tensor veli palatini tenses the soft palate.

False Signup and view all the answers

Where is the orifice of the Eustachian tube, anatomically?

Nasopharynx. Signup and view all the answers

What muscle underlies the anterior faucial pillars?

Palatoglossus or glossopalatine. Signup and view all the answers

What muscle underlies the posterior faucial pillars?

Palatopharyngeus. Signup and view all the answers

Is the glossopalatine a muscle of the soft palate or of the tongue?

Both Signup and view all the answers

If the muscle spindles of the genioglossus are triggered to respond, what will happen to the tongue?

The tongue will depress if protruded, and depress toward the floor of the mouth. Signup and view all the answers

If the muscle spindles of the palatoglossus are triggered to respond, what will happen to the tongue and soft palate?

The tongue will elevate and the velum will depress. Signup and view all the answers

Why would a dentist inject deep in your mouth to deaden your mandibular incisors?

The nerve serving sensation is exposed at that point as it enters the mandibular foramen to innervate the lower teeth. Signup and view all the answers

Study Notes

Articulatory System Overview

The articulatory system filters the phonatory source, shaping the sounds produced in speech.

Movable Articulators

Key movable articulators include the lips, mandible, velum, tongue, cheeks, fauces, pharynx, and larynx.

Immovable Articulators

Immovable articulators consist of the alveolar ridge of maxillae, hard palate, and teeth.

Source-Filter Theory

Source-filter theory posits that the voiced signal from the vocal folds is modified by the vocal tract, shaping it into speech sounds.

Nasal Septum Components

The nasal septum is made up of the vomer, perpendicular plate of the ethmoid, and septal cartilage.

Ethmoid Bone

The ethmoid bone is continuous with both the nasal septum and the braincase, featuring a perforated plate that serves as a conduit for the olfactory nerve.

Nasal Conchae

Nasal conchae or turbinates are covered with vascularized epithelia, which help heat and humidify the air entering through the nasal passages, contributing to nosebleeds.

Hard Palate Bones

The hard palate is formed by the palatine and maxillae bones.

Hard Palate Components

Components of the hard palate include the palatine processes of the maxillae and horizontal plates of the palatine bones.

Major Velum Muscle

Levator veli palatini is recognized as the major muscle involved with the velum.

Tensor Veli Palatini

Recent research indicates that the tensor veli palatini functions primarily as a dilator of the Eustachian tube rather than tensing the soft palate.

Eustachian Tube Location

The orifice of the Eustachian tube is anatomically located in the nasopharynx.

Anterior Faucial Pillars Muscle

The palatoglossus, also known as glossopalatine, underlies the anterior faucial pillars.

Posterior Faucial Pillars Muscle

The muscle that underlies the posterior faucial pillars is known as palatopharyngeus.

Glossopalatine Function

The glossopalatine can either elevate the posterior tongue with an anchored velum or depress the velum when the tongue is anchored.

Genioglossus Response

If the muscle spindles of the genioglossus are activated, the tongue will depress if protruded and drop toward the floor of the mouth.

Palatoglossus Response

Activation of the palatoglossus muscle spindles results in the elevation of the tongue and depression of the velum.

Dental Anesthesia

Dentists inject into the mandibular foramen to deaden nerves serving sensation to lower teeth during procedures, ensuring effective anesthesia.

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Description

Test your knowledge on the articulatory system with these flashcards. This quiz covers the functions and components of articulators involved in speech production, including both moveable and immoveable parts. Perfect for students studying anatomy and physiology.