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Muscle Study Notes-1 copy (1).pdf

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Western University
Health Sciences
Health Sciences 2300A/B

Muscles of the Head and Neck Muusclee Origin Insertion Function Notes Occiptofontalsiis Raise and Tendon connecting depresses eyebrows occipitalis and frontalis Orbicuars Occullii Surrounds eye Winking muscle Sphincter Zygomaatcus Maaoro Zygomatic Corner of mouth Smiling muscle Anterior = Minor and Minor Posterior = Major Orbicuars Orrsis Surrounds mouth Kissing muscle Risorusu Temporal mandibular Corner of mouth Whistling muscle joint Depressor AngullOriss Angle of mandible Corner of mouth Frowning muscle F Patysmaa Shaving muscle Compplexattachmeens toskin,fasca and someetmeesboone Allmuscles nnervated byfacialnerve(CNN7) -Nerve entersthe AMM and exst he SM forameen -Nerve 5 main bannches:temppora,zygommatc,,buccal,manndbular,cervcallllll Buccinator Jaw side to side to Innervated by CN7 keep food b/w teeth Massseer Zygomatic process Angle of the Chewing Very wide muscle mandible C Tempporalsiis Temporal bone Cornoid process of Chewing Goes under mandible zygomatic process and deep fascia Muuscle Origin Insertion Function Notes Innervated bymaandibularbranch (3 bbranch)offrgeeminalnerve (CN55-3)-ExxceptBuuccnatorin LateralPterygoidd Pterygoid process on Mandible Moves jaw side-to- Moves laterally of sphenoid bone side & forward/ pterygoid process backward C MeedialPterygodid Pterygoid process on Mandible Assists in elevation Moves medially of sphenoid bone Same as Lateral P pterygoid process Paaatoglossus Soft palate Glossus Elevates tongue Innervated by vagus Also gag reflex nerve (parasympathetic) Geeniogosssus Inside of cheek Bottom side of Protraction and Ensures we don’t tongue depression of swallow our tongue tongue Stylogosssus Styloid process Underside of Retract and elevate tongue tongue Hyyogosssus Hyoid bone Underside of Depresses tongue T tongue Innervated byhyppogosssalnerve CNN12))-ExxceptPalatoglossuso Suuperor Oblquee Superior surface of Eye orbit Rotates eye medially Attaches to eye at eye oblique angle because of trochlea (small piece of tendon) Innervated by trochlear nerve (CN4) Muuscle Origin Insertion Function Notes InferorObblqueq Inferior surface of Eye orbit Rotates eye laterallNo trochlea eye SuuperorReectus Ring around the Superior on the Look up optic nerve eye MeedialRectus Ring around the Medial on the eye Look medially optic nerve InferorReecus Ring around the Inferior on the eye Look down optic nerve LateralReccus Ring around the Lateral on the eye Look lateral (abductInnervated by optic nerve abducens nerve E (CN6) Innervatedbyyoculomooor nerve(CNN2)- ExceptLateralReecus and SupeerorObblquelliiiiiiq Stylopharyngeus Styloid process Innervated by glossopharyngeal nerve (CN10) Paaatropharyngeus Soft palate Pharynx Push food down and elevates pharynx and larynx SuuperorPhharyngea Push food down Coonstrcor during swallowing Middde Pharyngeall Push food down P Coonstrcor during swallowing Muuscle Origin Insertion Function Notes InferorPhharyngeall Push food down Coonstrcorr during swallowing Innervated byvaggusneeve (CN110)- Except Sylopharyngeeus - Parasymppathetcmeeaning swallowing s auonnomiciiiic Myylohyodid Inner side of Hyoid bone Raise arynxorr Hyoid bone is mandible depressmaandiblellle attached to larynx opeenmoouth) Geeniohyoidd Inner side of chin Hyoid bone Stylohyoidd Styloid process Hyoid bone Diastrcic Anterior Inner side of chin Hyoid bone Anterorhaastrocheae S (2 bely)ly Posterior Mastoid process onhyyodid Ommoohyoid Superior Hyoid bone Depresses thehyyodiiiSmaaltendon that bone and arynxa ataches toclavclee Inferior Attaches to inferiordurng swalowwingiino o creae a puleyle border of scapula and speakingiin restng arynx to Thhyohhyodid estnggspot)) Works with sternocleidomastoid A Sternothryoidd Thyroid cartilage of Sternum I larynx Sternohyyodid Hyoid bone Sternum Asssormeentof nnervatonn:Facia,Trrgenminaa,Hyypoglassa, and Cervcallootssr Muuscle Origin Insertion Function Notes Sternocledoomassoidd Sternum and Mastoid process Rotation of neck Innervated by - If contract right, rotates Clavicle (2 heads) head to left accessory nerve (CN11) AnteriorScalene Transverse poccess Firstrbib Deeep breathngin nneevated by ofcervcalll (rasing rb 1& 2) cervcalroots A Middle Scalene PosseriorScalene Second rib Splenius Capitsis Mastoid process Exxensson ofheead nneevated by anddnecck cervcalroots Splenius Cervicsis Spinous process of Doesn’t reach L P cervical head Muscles of the Trunk Muuscle Origin Insertion Function Notes Ilocostalsiis Ilium (1 ) and lumbar All along the ribs Standdng muusclese Thoracolumbbar vertebrae ascia s assca near (thoracolumbar fascia) Exxenddthe runk, umbbar egion and maainain posture ium (smaallofback) Longgssimuus Thoracolumbar Transverse processesanddbalance fascia of vertebrae all the way to the base of the skull .L.S =I keliiik Alwaaysbeeng usedd sanddngin Spinalsiis Thoracolumbar Spinous processes fascia of all the VC Deep bacckmuusclese E Innervated bydoosallootssr Muuscle Origin Insertion Function Notes ntertannsversaruss Ruuns fom oone tannsverse process to he Extension, aterallll There isnooorrginiin nexxt flexion ofback andd and inserton, ustju otatonn ofvertebrae atacchmeents Rotatores Sppnoous process totransverse processsoff adjacenntvertebrae Maintains orderandd Deeepest back proeccton ofspinallll muusclesle Multfiduus Skkps overrtop ofone vertebrae (e,spnouspocessofT1 o ansveseproessofT3)) cord nterspinalsiis Ruuns n betweeen succeessveespinouus processses T nneervated bydoorsalroots r Transverse Thoracolumbar fascia, iLinea alba Fexxthe tunnk, Deepest layer crest, inginual ligament and Fibers orientation is Adbominus ribs (costal cartilage) ateralflexion andd horizontal ( wistngg ofthe spneen Internal Oblique Iliac crest Linea alba and ribs Middle layer 7-10 Channge hee Fibers orientation is toward abdomiinalpresssure back pockets O taking a sht)it External Ribs 5 - 12 Linea alba and iliac Tendon continues growing Oblique crest distal creating Inguinal ligament S Fibers orientation is toward front pockets nneervated by ntercostalnerve n Rectus Abddominuus Costal cartilage and Pubic boides and Flex the trunk Innervated by xiphoid process symphysis intercostal nerve A Muusclee Origin Insertion Function Notes Lneea Alba Xiphoid process Pubic symphysis Major insertion point foTendonous line located abdominus muscles at the center of the abdominal region T I Teninouss 3 le withn the rectus abdoominuus Crreate muutipe beelesswithin hee eccuss ntersecctons abbdomiinus nternall Superior border of Inferior border of Lowers ribs Expiration each rib each rib Anterior superior pattern of fibers Externall Inferior border of Superior border of Elevates ribs Inspiration Posterior inferior pattern each rib each rib of fibers nneervated by ntercoostalnerve n I Diaphraggm Xiphoid process, Central tendon Muscle fiber pull on Sits at the bottom level costal cartilage and central tendon of ribs lumbar vertebrae Pulls down Increase thoracic cavity inferior diaphragm nneervated by phrennc nerve 3holes ndiaphaggm alow orpassage rom thoracccaviy o abdominalcaviyiiiitttttty D 1.Hiaus orrhe nferorvena cava 2.Esophageealhatustttu 3.Aortchiausstttuc Muscles of the Pectoralis Girdle and Upper Limbs - Separated into 2 groups: 1. Muscles that move the shoulder a. Anterior b.Posterior 2. Muscles that move the humerus a. Axial i. Anterior ii. Posterior b. Scapular i. Anterior ii. Posterior Pectoral Girdle: Muscles that Move the Shoulder Muusccee Origin Insertion Function Notes Superior fibers Base of skull and Spine of scapula Rotates scapula nnervated by cervical vertebrae Ligamentum upwards and accessorynerve nuchae elevates T Middle fibers Spine of scapula Retract/adduction of Ligamentum scapula nuchae Inferior fibers Spine of scapula Rotates scapula Ligamentum upwards and nuchae depresses P Rhommboid Maajorand Ligamentum nuchae Medial border of Rotates scapula Innervated by dorsal Minor) scapula downwards and scapula nerve adducts Musscee Origin Insertion Function Notes LevatorSccapulae Cervical vertebrae Medial border of Elevataing the Innervated by dorsal scapula scapular and scapula nerve rotating PectorlsMiinor Ribs 1-5 Coracoid process Rotates scapula Innervated by downwards and pectoral nerve abducts Subccavius Rib 1 Under side of Depresses and Innervated by the clavicle stabilizes the subclavian nerve clavicle Coracobbacchalsiis Innervated by the musculocutaneous A nerve SerratusAnnerior Ribs 2-9 Medial border of Rotates scapula Innervated by long scapula upwards and thoracic nerve abducts Pectoral Girdle: Muscles that Move the Humerus Muscle Origin Insertion Function Notes Pectoralis Major Scapula and axial Flexion, medial Innervated by the skeleton rotation and pectoral nerve adduction of (medial and lateral) A A humerus Muscle Origin Insertion Function Notes Latissimus Dorsi Thoracolumbar Bicipital groove Adducts the Innervated by the fascia humerus, extends thoracodorsal nerve
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