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Anatomy of Speech & Hearing- Chpt. 2 Pt. 2

by: Kenzie Rattan

Anatomy of Speech & Hearing- Chpt. 2 Pt. 2 SPHS 3025

Marketplace > University of North Texas > Anatomy > SPHS 3025 > Anatomy of Speech Hearing Chpt 2 Pt 2
Kenzie Rattan
GPA 3.75

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About this Document

Anatomy of Respiratory System
Anatomical Bases of Speech and Hearing
Janis Deane, Shannon Presley
Class Notes
Anatomy of Speech & Hearing
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This 4 page Class Notes was uploaded by Kenzie Rattan on Thursday February 4, 2016. The Class Notes belongs to SPHS 3025 at University of North Texas taught by Janis Deane, Shannon Presley in Spring 2016. Since its upload, it has received 23 views. For similar materials see Anatomical Bases of Speech and Hearing in Anatomy at University of North Texas.


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Date Created: 02/04/16
Anatomy of Respiratory System- Respiratory- Muscles of Inspiration: Diaphragm- -Primary muscle of inspiration. -Separates the thoracic & abdominal cavities. -Main muscle for quiet breathing/sitting still & breathing. -Inferior point is diaphragm. -Dome shaped muscle w/ a central tendon (aponeurosis). -3 groups of muscle fibers: ALL depress central tendon & enlarge vertical dimension of thorax. *Costal- ribs *Sternal *Lumbar- vertebrae Anterior Thoracic Muscles: External Intercostal- -Most important for speech -Elevates rib cage -Increase capacity for our voice & speech -Helps with inspiration Interchondral portion of the internal intercostal- -Helps elevate ribs 1-11 -Internal intercostal- (two portions) *Mostly involved w/ expiration *Small portion involved w/ inspiration Pectoralis Major- -Elevates sternum Pectoralis Minor- -Increases transverse dimension of rib cage Serratus Anterior- -Elevates ribs 1-9 -Looks like saw-like fingers Subclavius- -Elevates rib 1 -Underneath the clavicle Cervical Muscles: Sternocleidomastoid- -Elevates the sternum -Helps elevate the ribs -Helps rotate our head & neck Scalenus Anterior- -Elevates rib 1 Scalenus Medius- -Elevates rib 1 Scalenus Posterior- -Elevates rib 2 Posterior Thoracic Muscles: Levatores Costarum (brevis & longis)- -Helps elevate rib cage from behind -Behind the rib cage -Brevis- short -Longis- long Trapezius- -Trunk stability -Elongates neck & controls head -Stabilizes neck & our head Rhomboideus Major- -Trunk control/stability -Stabilizes shoulder girdle Rhomboideus Minor- -Stabilizes shoulder girdle Muscles of Expiration- *Anterior/Lateral Thoracic Muscles: Internal Intercostal (interosseous portion)- -Significant contributor to forced expiration. -Major muscle in expiration. Innermost Intercostal- -Depresses ribs 1-11 Transverse Thoracis- -Depresses rib cage -Underside of the sternum *Posterior Thoracic Muscles: Subcostal- -Depresses thorax Serratus Posterior Inferior- -Contraction pulls the rib cage down supporting expiratory effort Latissimus Dorsi- -Stabilizes posterior abdominal wall for expiration *Anterolateral Abdominal Muscles: Internal Oblique Abdomins- -Rotates & flexes trunk External Oblique Abdominis- -Compresses the abdomen -Flex vertebral column (flexion) -Most superficial to our abdominal muscles *Abdominal Muscles: Transversus Abdominis- -Compresses the abdomen Rectus Abdominis- -Flexion of vertebral column -Helps w/ flexion -Helps compress the abdomen *Posterior Abdominal Muscles: Quadratus Lumborum- -Bilateral contraction fixes abdominal wall in support of abdominal compression. -Supports the posterior wall. -Supports the abdominal cavity from behind (posteriorly).


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