Exam 3 Chapter 4/5 Flashcards
(140 cards)
Facts about the EPIGLOTTIS
Chapter 4
- large leaf shaped structure
- attached to the thyroid cartilage
- Primary function is to keep food from going down the trachea
What cartilage sits on top of the cricoid cartilage?
Chapter 4
Arytenoid Cartilages
Name the SUPRAHYOID EXTRINSIC MUSCLES of the LARYNX
Chapter 4
- Stylohyoid -pulls hyoid up and back
- Mylohyoid -elevates hyoid & tongue
- Geniohyoid -pulls hyoid up & back
- Anterior belly of the Digastric- elevates hyoid and assists in depressing mandible
Name the INFRAHYOID EXTRINSIC MUSCLES of the LARYNX
chapter 4
- Thyrohyoid (important in elevating the larynx during swallowing) F: pulls hyoid down and draws thryoid up
- Omohyoid - F: draws hyoid down
- Sternohyoid - F: Pulls hyoid down
- Sternothyroid - F: depresses thyroid
Name the INTRINSIC LARYNGEAL muscles
chapter 4
- Cricothyroid muscle
- Thyroarytenoid
- Lateral Cricoarytenoid
- Interarytenoid
- Posterior Cricorytenoid
What does the CRICOTHYROID muscle do and what is it innervated by?
chapter 4
The Cricothyroid:
•runs from side of the cricoid and proceeds up to attach to thyroid
•MAIN TENSOR of the folds
•raises fundamental frequency through elongation of tensing the folds
•NOT AN ADDUCTER
INNERVATED BY the external branch of the superior laryngeal nerve (VAGUS X)
What does the posterior CRICOARYTENOID muscle do and what is it innervated by?
chapter 4
- acts to rotate arytenoid cartilages when they contract (moves folds apart)
- only ABDUCTER muscle that actively opens VF
INNERVATED by the inferior laryngeal nerve/ Recurrent laryngeal nerve
What does the LATERAL CRICOARYTENOID muscle do?
chapter 4
- adductor
* pulls processes of arytenoids, which closes vocal folds
What do the INTERARYTENOIDS do?
How many are there? Name them.
Chapter 4
• Adductors • 2 (a pair) - Oblique Arytenoid (make an X) - Transvers Arytenoid • Thought to be primary adductors of the VF
What are the THYROARYTENOIDS?
What are they made up of?
Chapter 4
- Make up the mass of the VF
- Run from inside of the thyroid to the arytenoids
They are made up of :
•Vocal Ligaments- thickened edges
•Vocalis (thyrovocalis) -makes up most of the VF and thought to aid in tensing VF
•Thyromuscularis -lies lateral to the vocalis
•Mucous Membrane -covers the VF
All intrinsic laryngeal muscles are innervated by the ____1_____ except for the ______2_______. <- This muscle is innervated by the _____3_____.
chapter 4
- Recurrent Laryngeal Nerve
- Except the Cricothyroid Muscle
- External branch of the superior laryngeal nerve (vagus X)
The vocal folds are attached to the ____1______ in the front and 2 ____2______ in the back.
chapter 4
- Thyroid Cartilage
2. Arytenoid cartilages
Fo is mainly affected by creating longitudinal tension via what muscle?
Chapter 4
Cricothyroid muscle
*from varying subglottal pressure
What 2 things happen as air passes through the folds? Slide 22
Chapter 4
- Velocity of the air stream increases
- The pressure between the edges of the VF drops or decreases
* this lowered air pressure sucks the VF together
Name the 2 factors involved when the vocal folds close. Slide 21
Chapter 4
- The elasticity of the folds brings them back to their resting place
- Bernoulli effect
The fundamental frequency is determined by what 3 things?
Chapter 4
- Mass (thickness/length)
- Tension
- Elasticity
Describe the myoelastic aerodynamic theory of phonation.
Chapter 4
Theory of how phonation occurs by combining muscular and aerodynamic forces
Myoelastic - means how muscles of the vocal folds change their elasticity and tension so that changes of frequency of vibration are effected
How can a person increase the frequency of his or her vibration?
Chapter 4
by lengthening and tensing the folds via the cricothyroid muscle
*increase frequency by decreasing mass
The main way to tense VF is to stretch them via what muscle?
Chapter 4
Cricothyroid Muscle
What are the 3 main physiologic components of speech production?
- Subglottal - includes the lungs & trachea
- Larynx
- Supraglottal - includes oral cavity, nasal cavity, and the articulators
What are 6 active structures involved in speech production?
- Lungs - provides air necessary for speech production
- Larynx - contains vocal folds which interrupt air stream and cause vibration
- Velum - soft palate ; open (down) for breathing and nasal sounds, closed (up) for all other speech sounds and chewing/swallowing
- Jaw/Mandible - raises or lowers, changing the size of the oral cavity.
- Tongue - moest movable
- Lips- changes size/shape of oral opening
- How is a sound produces?
2. How is a sound modified?
- produced by the vibration of the coal folds
2. sound is modified by the articulators
Name the primary articulators.
- Tongue
- Lips
- Velum
- Jaw/Mandible
- Articulation refers to……
2. Resonance refers to…….
- Articulation refers to the movements of the articulators to create sound
- Resonance refers to the acoustic response of air particles in the cavities (sound resonates in cavities and the size of the cavity changes the resonance)