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CDO 3354 Week Ten Notes

by: Rachel Roede

CDO 3354 Week Ten Notes CDO 335

Rachel Roede

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About this Document

Anatomy & Physiology of Speech and Hearing
Lori Bissell
Class Notes
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This 4 page Class Notes was uploaded by Rachel Roede on Friday November 6, 2015. The Class Notes belongs to CDO 335 at Central Michigan University taught by Lori Bissell in Summer 2015. Since its upload, it has received 48 views. For similar materials see Anatomy & Physiology of Speech and Hearing in Communication Disorders & Sciences at Central Michigan University.

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Popular in Communication Disorders & Sciences


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Date Created: 11/06/15
CDO 335 Week Ten Notes Extrinsic Muscles of Larynx Sternothyroid Muscle  Runs from the sternum to the thyroid cartilage  Function: o Depresses/lowers thyroid cartilage and lowers larynx  Innervation: o XII Hypoglossal Nerve o C1 and C2 (cervical spinal nerves 1 &2) Thyrohyoid Muscle  Runs from the thyroid to the hyoid bone  Small, right were sternohyoid muscle ends  Function: o Depresses/lowers the hyoid bone o Elevates/raises thyroid and larynx  Innervation: o XII Hypoglossal o C1 (cervical spinal nerve 1) Sternohyoid Muscle  Runs from the sternum to the hyoid bone  Function: o Depresses/lowers hyoid bone  Innervation: o C1, C2, C3 only Omohyoid Muscle  Is a two-bellied muscle  Superior belly and inferior belly  Runs from scapula to hyoid bone meets at intermediate tendon o Superior runs vertically, inferior courses from scapula medially and upward to meet superior  Function: o Depresses/lowers hyoid bone o Prevents neck from collapsing  Innervation: o C2 and C3 Digastric Muscle  Is a two-bellied muscle  Anterior belly and posterior belly  Anterior belly starts at the mandible and the posterior belly starts at the styloid process and meets together at the intermediate tendon, connecting to the hyoid bone  Function: o Anterior belly: pulls hyoid bone up and forward o Posterior belly: pulls hyoid up and back  Innervation: o Anterior belly: V Trigeminal Nerve (mandibular branch) o Posterior belly: VII Facial Nerve Stylohyoid Muscle  Runs from styloid process to the hyoid bone  Runs parallel to posterior belly of digestive muscle  Function: o Pulls hyoid up and back  Innervation: o VII Facial Nerve Mylohyoid Muscle  Runs from mandible to the hyoid bone  “floor” underneath the chin; primary muscle of tonge  Function: o Elevates/raises hyoid bone o Elevates/raises the tongue o Depresses mandible  Innervation: o V Trigeminal (mandibular branch) Geniohyoid Muscle  Runs from mandible to hyoid  Function: o Elevates hyoid o Elevates tongue o Depresses mandible  Innervation: o XII Hypoglossal Respiration and the Respiratory System Respiration  Gas-exchanging system  Inspiration – bringing oxygen to the cells  Expiration – elimination of waste by breathing out  Gas-exchange takes place in alveoli o Minute air sacs in lungs Respiratory System  Spine  Girdles (shoulder and pelvic)  Ribs  Sternum The Spine/Vertebral Colum  Cervical Vertebrae (7) o C1 – C7  Thoracic Vertebrae (12) o T1 – T12  Lumbar Vertebrae (5) o L1 – L5  Sacral Vertebrae (5 becomes 1) o Sacrum is one structure made up of 5 that fused  Coccygeal Vertebrae (3-4 becomes 1) o Coccyx/tailbone Vertebral Anatomy (Typical)  Body/corpus o Rounded projection o Anterior to spinal nerves  Pedicles o Projections off of the body  Laminae o Found off the pedicles  Spinous Process o Downward projections on posterior end o What can be felt on back o Points downward  Transverse Process o Lateral projections off the side  Vertebral Foramen o Posterior to corpus through which spinal cord passes  Superior Articular Facet o Area on vertebrae where something else will attach  Facets o Articular Facets (off pedicle) – where 2 vertebrae will meet  Superior  Inferior o Costal Facet – where vertebrae articulates with ribs  Transvers (off of transvers process)  Superior (off of body)  Inferior (off of body) o Variations:  C1  C2  Dens/Odentoid Process


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