Muscles and Facial Muscles
Muscles and Facial Muscles Bio 3310
Popular in Anatomy and Physiology I
verified elite notetaker
Popular in Biology
This 5 page Class Notes was uploaded by Melanie Queener on Wednesday September 30, 2015. The Class Notes belongs to Bio 3310 at Bowling Green State University taught by Dr. Ray Larsen in Fall 2015. Since its upload, it has received 44 views. For similar materials see Anatomy and Physiology I in Biology at Bowling Green State University.
Reviews for Muscles and Facial Muscles
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 09/30/15
Muscles Top Muscles Deltoid o Anterior Flexes and medially rotates the arm 0 Middle abducts the arm 0 Posterior extends and laterally rotates the arm Sternocleiodomastoid 0 Origin SternumclaVicle o Insertion mastoid o Contraction of one bend head laterally and rotate to opposite side 0 Contraction on both exes neck I Forced inspiration Biceps Brachii o Origins subraglenoid tubercle back of scapula 39 Coracoids process 0 Insertions aponeurosis of lower arm exes radius 0 Flexes and supinates the forearm Zygomatic major 0 Origin zygomatic bone 0 Insertion anguli oris orbicularis oris depressor anguli oris o Draws angle of mouth up and outward Gastrocnemius o Origins upper portion on femur o Insertion Achilles tendon o Plantar exion of ankle joint assists exion of knee Introduction Produce body movements Stabilizing body position Moving substances within the body Generating heat Transform chemical energy into mechanical energy Properties 0 Excitability respond to stimuli o Contractility contract forcibly when stimulated o Extensibility stretch without being damaged 0 Elasticity return to original length Types 0 Skeletal smooth cardiac o Skeletal I Cells fibers generate force Connective tissue anchor and structure Blood nutrients and waste Nerves control feedback Most move bones 0 Voluntary 0 Activity consciously controlled 0 Also subject to subconscious control Attachment sites 0 Skeletal muscles exert force on tendons pulling on bones or other structures 0 Origins stationary bones o Insertions Movable bone Coordination 0 Work in groups 0 Movements usually result from several skeletal muscles 0 Antagonistic pairs at joints 0 Flexors vs extensors 0 Synergists stabilize the intermediate joints 0 Other muscles act as fixators stabilizing the origin of the agonist 0 Depending on required movement many muscles may act as agonists or fixators Compartments 0 Groups of functionally related muscles enclosed by fascia 0 Includes blood vessels and nerves that supply the group 0 Intramuscular septa are very thick fascia that separate components Architecture 0 Fibers are bundled into fascicle o Fascicles are bundled into a muscle 0 More force more contracting fibers 0 Usually not more than 10 of fibers acting at one time 0 Each fascicle has own blood supply and nerves 0 Break muscle it cannot regenerate Head and Facial Muscles Facial muscles play a big role in what your face looks like Role in how we communicate socially o Facial expressions 0 Same across cultures genetically inherited for humans Facial Expressions o Insertions are in the subcutaneous layer Occipitofrontalis o 2 occipital bellies o 2 frontal bellies 0 Joined by epicranial epineurosis I Connective tissue 0 Raises eyebrows Orbicularis Oculi 0 Circular set of muscle 0 Origin on bone insertion on itself 0 Opens eyes Palpebral ssure and nose 0 Procerus eye brows down I When frowning o Corrugator supercili wrinkled brow o Levator labii superioris lifts lip showing teeth 0 Nasalis are nostrils Mouth 0 Zygomaticus minor lifts lip from side I Maj or corner of mouth Obicularus pucker lips Risorius pulls mouth to side Depressors pull lip down in the corner I Frowning Depressor Labii Inferioris pull down lip and show bottom teeth 0 Mentalis wrinkles chin I Pouting Eye muscles extrinsic o Levator palpebrae superioris eyelid movement 0 Muscles with rectus in name turns to sides up and down 0 Oblique muscles I Inferior pulls eye I Superior sweeps eye up to the outside 0 Trochlea loop of connective tissue 0 Enter through superior fissure Mastication o Masseter o Temporalis strength of bite o Medial pterygoid strength of bite I Chewing 0 Side to side movement 0 Medial and lateral pterygoid o Protract mandible 0 Four pairs of head muscles muscles of mastication Temporalis origin temporal bone I Insertion corticoid process of mandible I Goes through the zygomatic arch I Chewing o Masseter I Insertion lower job I Origin bottom of zygomatic arch I Elevates and pertrudes mandible I Strongest muscle related to size I Muscular sling Nose 0 Lateral nasal cartilage top of nose 0 Alar shape 0 Major alar shape of nostrils Ears Auricle Temporomandibular joint 0 O Articulation of the condyle of mandible with the mandibular fossa of temporal bone Synovial cavity of the TM is divided into superior and inferior chambers Li gaments I Lateral prevents posterior displacement I Sphenomandibular medial side I Stylomandibular Joint hinge plane and condylar joints I Only mandible moves I Wide variety of motions I Opens in two different ways 0 Open a little uses weak muscles 0 Open wide 0 Lateral pterygoid pulls on corticoid process o Slips pivot point down 0 Getting hit gt dislocation 0 TM Syndrome 39 Symptoms 0 Facial pain 0 Clicking sound in jaw 0 Limitation of jaw movement 0 Ear ringing o Headaches I Caused by psychological tension and teeth misalignment I Physical therapy psychological management antiin ammatory drugs corrective dental appliances
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'