Vocal pedagogy. Contact information Frances Ascott ENT Dept Manchester Royal Infirmary 0161 276 4215...
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Transcript of Vocal pedagogy. Contact information Frances Ascott ENT Dept Manchester Royal Infirmary 0161 276 4215...
![Page 1: Vocal pedagogy. Contact information Frances Ascott ENT Dept Manchester Royal Infirmary 0161 276 4215 (voicemail) frances.ascott@cmft.nhs.uk.](https://reader031.fdocuments.us/reader031/viewer/2022031921/56649c785503460f9492df22/html5/thumbnails/1.jpg)
Vocal pedagogy
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Contact information Frances Ascott ENT Dept Manchester Royal Infirmary 0161 276 4215 (voicemail) [email protected]
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Vocal pedagogy The method and practice of
teaching In order that you can effectively teach
students in singing you need to understand the mechanism. It is no longer acceptable to teach purely “by ear” although your musical skills, interpretation, tuning and many more shills are also required. The first part of this course is dealing with the physical aspect of voice production. Valuable for you as singers and as a teachers of singing
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Opportunity for Questions As we go along At the end of sessions Make an appointment/arrangement At end of course
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A Functional Approach to Voice Production
Anatomy
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Cycle of voice production
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course Anatomy and physiology of these
systems Function
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Useful terminology in anatomy
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Larynx
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Main functions of the larynx Respiration
Acts as a valve to regulate airflow
Protection/swallowing Closes during swallow to prevent
aspiration by action of epiglottis and up and forward movement
Thoracic fixation Closure of upper airway temporarily to
increase abdominal pressure
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Position of larynx
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Larynx
The larynx sits at the top of the windpipe/trachea
It sits in front of the hypopharynx
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Laryngeal cartilages Cartilages
1 x thyroid 1 x cricoid 2 x arytenoid 1 x epiglottis 2 x corniculate 2 x cuneiform 2 x triticea
Bone hyoid
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Larynx from front
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Thyroid cartilage
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Thyroid cartilage Thyroid cartilage is the largest cartilage Made of 2 quadrangular plates called
thyroid lamina. Each plate has 2 surfaces :Inner & outer
4 Borders : Upper,Lower,anterior,posterior
Anterior border Anterior borders unites at an angle or approximately 90° in men and 120° in women Thyroid prominence (Adams apple) separated by Thyroid notch
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Posterior borders :Prolonged upwards & downwards called Sup. & Inf. Horns or Cornu
Superior horn connects to the hyoid bone Lateral thyrohyoid ligament
Inferior horn is connected to the cricoid cartilage by Cricothyroid joint in a facet at the medial surface for cricoid arch
Ossification or calcification of the thyroid cartilage begins early at around 20 years starting posteriorly and inferiorly
Thyroid cartilage
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Thyroid cartilage Halfway between the thyroid notch
and the inferior border is a slight depression which marks the level of the vocal cords.
The cartilage is covered in perichondrium and on the inner surface this is covered my mucosal membrane
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Cricoid cartilage
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Cricoid cartilage This a signet ring in shape It is the only full ring of cartilage in
the airway The posterior lamina may be up to
30mm in height The cricoid arch at the front can be
as little as a few mm in height. Because it is thin it tens to ossify/calcify later
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Cricoid cartilage Internal dimension vary a lot Women average 11.6mm range
8.9-17mm Men average 15mm range from
11-21mm The distance between the
Cricothyroid joint facets also varies
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Arytenoid cartilages
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Arytenoid cartilages 2 Pyramidal cartilages sit on top of
the wide, posterior facet of the cricoid cartilage
They begin to ossify around 30 years of age.
They are capable of complex movement coming together in the midline and revolve over the cricoid
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Corniculate and Cuneiform and Triticea cartilages Sitting on the top of the apex of the
arytenoids are the Corniculate cartilages. These help with the rigidity of the aryepiglottic folds
The cuneiform cartilages in the aryepiglottic folds help with epiglottic movement in swallowing
The Triticeal cartilages are within the thyrohyoid ligament and can be mistaken on x-ray for a foreign body
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Epiglottis
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Position of the epiglottis
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Epiglottis Arises on the inner surface of the
thyroid cartilage above the insertion of the vocal cords.
Ligaments attach from the epiglottis to the hyoid bone, the thyroid cartilage, and the base of the tongue.
Attachment via ligaments rather than joints allows the epiglottic to move passively in tandem with these structures
It is quite soft and flexible
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Intrinsic muscles of the larynx The muscle within the larynx have
three main purposes Changing the tension of the vocal
folds Opening Closing the vocal folds
They may be described as abductor, adductor, tensor and relaxer
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Intrinsic muscles superior and sagittal views
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Intrinsic muscles anterior and posterior views
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Abductor muscle (opening) Posterior cricoarytenoid PCA Traditionally credited as the only
abductor Paired muscle from the posterior surface
of the cricoid cartilage and inserts onto the muscular process of the arytenoids
Pulls back on the muscular process swinging the front ends away from each other so opening the glottis for respiration
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Posterior Cricoarytenoid
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Abductors and adductors
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Adductor muscles Lateral cricoarytenoid Interarytenoid muscles
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Lateral cricoartenoid Plays the most active role in the
protection of the airway through closure
It regulates medial compression May have some abductory abilities
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Inter-arytenoid muscles Transverse muscle is unpaired Obliques are paired Transverse pulls arytenoids
horizontally together
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Movement or arytenoids
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Adductors 1
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Adductors 2
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Relaxer Muscle The thyro-arytenoid is the main
pitch lowering muscle. Contraction shortens the muscle lowering the pitch
Also contraction straightens and closes the vocal folds
It forms the bulk of the vocal cord It has 2 distinct muscle bands
Medial Thyroarytenoid (vocalis) Lateral Thyroarytenoid
(thromuscularis)
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Thyro-arytenoid muscles Note when the muscle is
contracted and also opposed by other muscles this will result in an increase in tension so it may also be described as a tensor
Check diagram to see muscle bands making up the vocal fold
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Thyro-arytenoid muscles
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Thyro-arytenoid muscles
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Tensor muscles The paired crico-thyroid muscles
which have two distinct parts pulling in slightly different directions
By closing the cricothyroid at the front the vocal folds are elongated and stretched increasing tension and pitch
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Cricothyroid muscles
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Action of cricothtroid
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Cricothyroid muscles
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Aryepiglottic muscles Sometimes describes as a sphincter Not easily fit into one of above
categories but still intrinsic laryngeal muscle
These muscle are continuation of oblique arytenoid muscle to epiglottis.
Pulls epiglottis down during swallow. Control not understood
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Aryepiglottic muscles
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Intrinsic membranes and ligaments Then form important structure to the
larynx. Conus elasticus is cone shaped below
the vocal folds. In the anterior midline it forms the
cricothyroid ligament which then divided to form vocal ligament (from the anterior inner surface of the thyroid cartilage back to the arytenoids. This is part of the vocal fold.
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Membranes and ligament Posterior/coronal
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Intrinsic membranes and ligaments The quadragular membrane form the
side walls of the laryngeal vestibule above the vocal folds
The inferior border forms the ventricular ligament in the ventricular folds (or false vocal folds)
The ventricular folds move largely passively. The mechanism is not entirely understood. Ideally they should be retracted to allow maximum freedom for vocal cord vibration
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Extrinsic muscles Titze 1994
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Laryngeal Elevators Elevators
Digastric Stylohyoid Mylohyoid Geniohyoid Thyrohyoid Hyoglossus Genioglossus muscles
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Laryngeal depressors
Sternohyoid Omohyoid
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Muscles which raise the larynx are called elevators
Elevation often goes with increase in pitch but the larynx can raise independent of pitch. There will be an acoustic change.
Opera quality require a fairly low position where as belt require a high setting.
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References Obert and Chicurel (2005) Geography of
the Voice. Pub Estill voice training systems
Perkins and Kent (1986) Textbook of Functional Anatomy of Speech, Language and Hearing. Pub Taylor and Francis
Sataloff (2006) Vocal Health and Pedagogy. Vol 1 Pub. Plural
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