Presentation on theme: "Unit 3: The Muscular System Lab 1: Muscles of the Axial Skeleton"— Presentation transcript:
1 Unit 3: The Muscular System Lab 1: Muscles of the Axial Skeleton Jessica Radke-Snead, RD, MSBio 241 Anatomy & Physiology
2 Getting Started Begin developing your strategy for this unit Organize your material (ie the study guide, lectures, labs)Develop a system for processing this informationStart with the broad componentsMuscles (categorize and group them)Indicated origins and insertions (use your knowledge of the skeletal system to guide you)Function (direction of fibers, type of joint)Continue to build to your knowledge (not all-inclusive)HistologyCharacteristics of the three types of muscle tissuePhysiology of a muscle contractionTypes of muscle contractionCharacteristics of muscle contractionsMuscle metabolism
3 Making Sense of the Muscles Description Location FunctionUse muscle origins and insertions to describe where the muscle is located AND what it doesOrigin: attachment of one muscle tendon to the stationary boneInsertion: attachment of the other muscle tendon to the moving boneAction: the movement that occurs at the joint due to the muscle contraction
4 Practice Muscle: Sternocleidomastoid Origin: Sternum and clavicle Insertion: Mastoid process of temporal boneFunction:Bilaterally: flexion of neck, with tilting of head forward and downward (try this!)Unilaterally: lateral flexion of neck, with rotation of head downward and to the side OPPOSITE of the contracting muscle (try this!)
5 Muscles: Head and Neck Movements related to Facial expressionEyeballMandible, tongue and pharynxHead and neckOrigin/Insertion requirementM, T & P: Masseter, genioglossus, stylohyoid, digastric, temporalisHead and neck: SternocleidomastoidCadaver requirementFacial expression: FrontalisHead and neck: Sternocleidomastoid, splenius capitis
6 Muscles: Head and Neck Masseter O: Maxilla and Zygomatic arch I: Angle and ramus of mandibleFx: and retracts mandibleSternocleidomastoidO: Sternum and clavicleI: Mastoid processFx: flexion, rotation of neck
13 Please let me know if you need assistance—have fun! Lab ObjectivesExam 2 return/reviewPlease see me if you are struggling with course materialLab 1: Be able to identify the location and function of each muscle, and origin/insertion if indicatedLab 2: Cadavers will be used WednesdayPreview and review Lab 2 muscles prior to this labPlease let me know if you need assistance—have fun!