CDO 3354 Week Ten Notes
CDO 3354 Week Ten Notes CDO 335
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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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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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