Slide 1

Naming Skeletal MusclesDirection of the muscle fibersNamed in reference to an imaginary lineRectus straight (parallel to line)Oblique at a slant to the lineRelative Size of the muscleMaximus largestMinimus smallestLongus - longestNaming Skeletal MusclesLocation of the muscleNamed for the bone with which they are associatedNumber of originsBi two originsTri threeQuad - fourNaming Skeletal MusclesLocation of the muscles origin and insertionExample is sternocleidomastoid = sternum, clavicle, and mastoid (process of the temporal bone)Shape of the muscleDeltoid means triangularAction of the MuscleFlexor, extensor, and adductorArrangement of Fascicles(Bundles of muscle fibers)Circular concentric rings, used for external body organs that need to close by contracting. Also known as a sphincterConvergent Converge to a single insertion tendon. Makes a fanlike or triangular muscleArrangement of Fascicles(Bundles of muscle fibers)Parallel length of fascicles run parallel to the long axis of the muscleFusiform Type of parallel that results in a spindle-shaped muscle with an expanded bellyPennate feathered pattern. Short fascicles attach obliquely to a central tendon. Unipennate attaches to one tendonBipennate attaches to two tendonsWhile multipennate attaches to many tendons

What do you think each of these muscles would do?

Facial MusclesFrontalis Covers frontal bone. Allows you to raise your eyebrows and wrinkle your foreheadOccipitalis Covers occipital bone and pulls the scalp posteriorlyOrbicularis Oculi circular muscle around the eye which allows your eyes to closeOrbicularis Oris Circular muscle of the lips, also known as the kissing muscleZygomaticus Extends from the corner of the mouth to the cheek bone. Also known as the smiling muscle

Chewing MusclesBuccinator Runs horizontally across the cheek and inserts into the orbicularis oris. It is also classified as a facial muscle. Responsible for flattening cheeksMasseter covers the angle of the jaw bone. Responsible for closing the jaw by elevating the mandibleTemporalis fanshaped muscle that covers the temporal bone. It is the synergist to the masseter

Neck MusclesPlatysma single sheetlike muscle that covers the anterolateral neck. Produces a downward sag of the mouthSternocleidomastoid a pair of two headed muscles found on each side of the neck. If both contract, they flex the neck and lower your head. If one contracts, it rotates your head(Cranial aponeurosis - Sheetlike tendon on the top of the skull)

Trunk Muscles - AnteriorPectoralis Major large fan-shaped muscle covering the upper part of the chest. It is used to adduct and flex the armIntercostal Muscles Deep muscles found between the ribs. They help with breathing by raising the ribcage.Trunk Muscles Abdominal GirdleRectus abdominis most superficial abdominal muscle. They flex the vertebral column, and compress the abdominal contents during defecation and child birthExternal oblique Make up lateral walls. They also flex the vertebral column, rotate the trunk, and bend it laterallyInternal oblique Deep to external, run at a right angle to them, and perform the same functionsTransversus abdominis Deepest abdominal muscle and it compress the abdominal contentsTrunk Muscles - PosteriorTrapezuis most superficial of these muscles and resembles a kite. They extend the head as well as elevate, depress, adduct, and stabilize the scapulaLatissimus Dorsi Covers the lower back and is responsible for extending and adducting the humerusErector Spinae It is composed of the longissimus, iliocostalis, and spinalis. These are the main extensors of the back as well as help control the action of bending over at the waist Deltoid triangular shaped muscles that form the shape of the shoulder and are the prime movers of arm abductionMuscles of the Upper LimbBiceps brachii The forearm muscle that is the prime mover for flexion and is used to supinate the forearm Brachialis muscle deep to the bicep that is used for elbow flexionBrachioradialis a weak arm muscleTriceps brachii the most powerful prime mover of elbow extension and is the antagonist of the bicepUse the descriptions and your knowledge of the bodys muscles to label the figures on the back of this paperHow did you do?

How did you do?

Muscles of the Lower LimbMovement at the HipGluteus Maximus Butt muscle It is a powerful hip extensor, especially when power is needed (jumping and stair climbing)Gluteus Medius Deep to the maximus muscle and is a hip abductor and stabilizes the hip during walkingIliopsoas a fused muscle (itiacus and psoas major) that is the prime mover of hip flexion and stabilizes upper body from falling backward while standingAdductor muscles a group of muscles that adduct the hips togetherMuscles of the Lower LimbMovement at the KneeHamstring Group Muscle mass of the posterior thigh that consists of the biceps femoris, semimembranosus, and the semitendinosusSartorius a weak thigh flexor which helps with crossing your legsQuadriceps Group The muscles that powerfully extend the knee consists of the rectus femoris and three vastus musclesMuscles of the Lower LimbMovement at the Ankle and FootTibialis Anterior This dorsiflex and invert the footExtensor Digitorum Longus it is the prime mover of toe extension and is also a dorsiflexor of the footFibularis Muscles composed of the longus, brevis, and tertius. The group plantar flexes and everts the foot Gastrocnemius Calf muscle. It is the prime mover for plantar flexion of the footSoleus also a strong plantar flexorUse the descriptions and your knowledge of the bodys muscles to label the figures on the back of this paperTake 2

Hamstring Group

DemonstrateEach group will be assigned some muscles.You will have a few minutes to come up with some a minute to win it activity to help other feel the discussed muscles.Try not to use ones that waste a lot of materials (example: the tissue box with one hand)The Ultimate TestI am going to show a video. As the video plays, I want your group to stand when your muscle group is being worked and sit when your muscles arent.