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?
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What components make up the nasal septum?
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What bone is continuous with the nasal septum and the braincase?
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What structures serve to heat and humidify the air as it enters the body through the nose?
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What bones contribute to the hard palate?
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What are the components of the hard palate?
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What is the major muscle of the velum?
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The tensor veli palatini tenses the soft palate.
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Where is the orifice of the Eustachian tube, anatomically?
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What muscle underlies the anterior faucial pillars?
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What muscle underlies the posterior faucial pillars?
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Is the glossopalatine a muscle of the soft palate or of the tongue?
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If the muscle spindles of the genioglossus are triggered to respond, what will happen to the tongue?
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If the muscle spindles of the palatoglossus are triggered to respond, what will happen to the tongue and soft palate?
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Why would a dentist inject deep in your mouth to deaden your mandibular incisors?
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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.