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W ARM - UP Read the HIV article silently. Partner A – beginning to how can a person reduce their risk of getting HIV ? Partner B – who is at risk to the.

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Presentation on theme: "W ARM - UP Read the HIV article silently. Partner A – beginning to how can a person reduce their risk of getting HIV ? Partner B – who is at risk to the."— Presentation transcript:

1 W ARM - UP Read the HIV article silently. Partner A – beginning to how can a person reduce their risk of getting HIV ? Partner B – who is at risk to the end

2 LEQ What are 10 muscles located superior to the pelvic cavity?

3 H OW MUSCLES CONTRACT  Muscles can only pull, not push!  To pull, muscles contract.  When muscles contract they shorten.  Muscles shorten because the muscles fibers slide past each other.  The sliding is like a trombone

4 M USCLE T ERMS  Hypertrophy ~ increase in size of a muscle  Due to overuse  Purposely done by athletes  Atrophy ~ decrease in size of a muscle  Wasting away  Lack of exercise : broken leg  Normal aging process  Delayed with exercise

5 M USCLE T ERMS  Most movement is performed by groups of muscles working together; however, a single muscle is generally responsible for MOST of the movement.  Prime mover ~ Chief muscle (responsible for movement)  Synergist ~ helper muscles  Antagonists ~ oppose the action of another muscle  Muscle pairs Muscle pairs

6 M USCLES OF THE T RUNK Involved in breathing Form the abdominal wall Move the vertebral column Form the pelvic region

7 M USCLES FOR B REATHING Intercostal Muscles ~ located between the ribs Origin and insertion on the ribs Responsible for raising and lowering the rib cage during breathing

8 M USCLES FOR B REATHING Diaphragm ~ dome- shaped muscle that separates the thoracic cavity from the abdominal cavity Chief muscle of inhalation

9 M USCLES OF THE A BDOMINAL W ALL Consists of 4 muscles Muscles are layered at different depths Fibers of these muscles run in different directions Contain, support and protect abdominal organs Contraction causes flexion and rotation of vertebral column, urination, defecation, and childbirth.

10 A BDOMINAL M USCLES Rectus abdominis ~ fibers run up and down Contraction flexes the vertebrae Increases intra- abdominal pressure

11 A BDOMINAL W ALL M USCLES External oblique ~ lateral walls of the abdomen Fibers run obliquely (slanted) Aids rectus abdominus (trunk rotation/lateral flexion)

12 A BDOMINAL W ALL M USCLES Internal oblique ~ add strength to the external oblique (crisscross with them)

13 A BDOMINAL W ALL M USCLES Transverse abdominis ~ fibers run horizontally Innermost layer of the abdominal muscles Responsible for compression

14 A NATOMY OF THE M USCULAR S YSTEM

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16 M USCLES OF THE V ERTEBRAL C OLUMN Attach to the vertebrae Move the vertebral column in numerous directions Numerous muscles….will not discuss in detail.

17 M USCLES OF THE S HOULDER Trapezius ~ origin in bases of the occipital bone and inserts on the scapula and clavicle Hyperextends head Contraction allows for shrugging and rotating movement Right and left trapezius form the shape of a trapezoid

18 A NATOMY OF THE M USCULAR S YSTEM

19 M USCLES OF THE S HOULDER Pectoralis Major ~ forms the anterior chest wall Connects the humerus with the clavicle and sternum Contraction moves the arm across the chest Adducts the arm

20 M USCLES OF THE S HOULDER Deltoid ~ forms the rounded portion of your shoulder (shoulder pad) Contraction abducts the arm

21 M USCLES OF THE S HOULDER Latissimus dorsi ~ Broad muscle located in the middle and lower back region. Origin vertebrae, insertion humerus Adducts shoulders and extends arm back. “Swimmers muscle”

22 M USCLES THAT M OVE THE F OREARM Triceps brachii ~ located on the posterior surface of the humerus. Prime mover of extension of the forearm Supports weight for push-ups Boxer muscle ~ packs the greatest punch

23 LEQ What are 10 muscles located superior to the pelvic cavity?

24 W ARM - UP Read the Herpes article A - Beginning to symptoms B - Contagious to end

25 L ET ’ S REVIEW ! What is a prime mover? Synergist? Antagonist? Hypertrophy? Atrophy? Flexion? Extension? Origin? Insertion? Contraction?

26 M USCLES THAT M OVE THE F OREARM Biceps brachii ~ located along the anterior surface of the humerus Flexes the forearm “Make a muscle”

27 M USCLES THAT M OVE THE F OREARM Brachioradialis ~ synergist of biceps brachii Origin on humerus, Inserts on radius Flexes forearm at elbow

28 M USCLES THAT M OVE THE W RIST, H AND, AND F INGERS More than 20 muscles Small which makes for delicate movement Generally located along the forearm The tendons of these muscles pass through the wrist into the hand and fingers.

29 M USCLES THAT M OVE THE W RIST, H AND, AND F INGERS Flexor digitorum ~ flexes fingers Anterior muscle

30 M USCLES THAT M OVE THE W RIST, H AND, AND F INGERS Extensor digitorum ~ extends fingers Posterior muscle

31 A NATOMY OF THE M USCULAR S YSTEM

32 S TORY TIME ! Create a story using the movements from 15 different muscles. For example, Jack makes a fist because he is so mad! Underline makes a fist. You may use all facial muscles and muscles superior to the pelvic cavity. You may not say abduct, adduct… Another reader will identify the muscle responsible for that action.

33 W ARM - UP Complete the muscle action chart using your brain – refer to notes if necessary.

34 A GENDA Collect Health Fair reflections Collect movie packet CC Health Day Remind app Test on muscles on Friday

35 LEQ What are 10 muscles located superior to the pelvic cavity?

36 L EQ What are 10 muscles located inferior to the pelvic cavity?

37 M USCLES OF THE P ELVIC F LOOR Assist in expelling contents from the urinary bladder and rectum Will not be discussed in detail

38 M USCLES THAT M OVE THE T HIGH, L EG, AND F OOT Some of the largest and strongest muscles of the body Move the lower extremities Help maintain posture

39 G LUTEAL M USCLES Located on the posterior surface Gluteus maximus ~ forms the area of the buttocks Largest muscle of the body Rotates the thigh laterally and extends the thigh at the hip (walking, stair climbing)

40 G LUTEAL M USCLES Gluteus medius ~ abduct and rotate the thigh medially at the hip

41 M USCLES THAT M OVE THE L EG Located on the thigh Extensor muscles lie along the anterior and lateral surfaces. Flexors lie along the posterior and medial surfaces

42 M USCLES THAT M OVE THE L EG Quadriceps Femoris ~ located on the anterior thigh Most powerful muscle in the body Contain four different parts Vastus lateralis Vastus intermedius Vastus medialis Rectus femoris All four parts cause extension of the leg at the knee

43 Q UADRICEPS F EMORIS Vastus lateralis

44 Q UADRICEPS F EMORIS Vastus intermedius ~ sits directly below the rectus femoris

45 Q UADRICEPS F EMORIS Vastus medialis

46 M USCLES THAT M OVE THE L EG Sartorius ~ crosses over anterior thigh Allows you to sit in cross leg position Laterally rotates thigh at hip

47 M USCLES THAT M OVE THE L EG Hamstrings ~ located on the posterior surface of the thigh Contain three different parts Biceps femoris Semimembranosus Semitendinosus

48 H AMSTRINGS Flex the leg at the knee Extend the thigh Strong tendons of these muscles can be felt behind the knee

49 H AMSTRINGS Biceps femoris Semimembranosus Semitendinosus

50 M USCLES THAT M OVE THE F OOT Located on the anterior, lateral, and posterior surfaces of the leg Tibialis anterior ~ located on anterior surface Causes dorsiflexion and inversion of the foot

51 M USCLES THAT M OVE THE F OOT Gastrocnemius ~ forms the calf of the leg Attach to the heel bone by the Achilles tendon Strongest tendon in the body Causes plantar flexion Toe dancer muscle

52 A NATOMY OF THE M USCULAR S YSTEM

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55 W ORKSHEET Complete the muscle function matching worksheet using your notes and the “Muscles: Name, Location, Function” chart.

56 L EQ What are 10 muscles located inferior to the pelvic cavity?

57 W ARM - UP Finish labeling the man with a body on both sides (we did the superior muscles already)

58 S TICKY N OTES A CTIVITY (30)  Vastus medialis  Diaphragm  Trapezius  Sartorious  Brachialis  Extensor digitorum  Intercostalis  Occipitalis  Biceps brachii  Deltoid  Soleus  External oblique  Gastrocnemius  Zygomaticus  Buccinator  Sternocleidomastoid  Orbicularis oculi  Orbicularis oris  Internal oblique  Flexor digitorum  Masseter  Frontalis  Latissiumus dorsi  Vastus lateralis  Rectus femoris  Tibialis anterior  Rectus abdominis  Biceps femoris  Pectoralis major  Gluteus maximus

59 C LASSIFYING MUSCLES All muscles superior/inferior to pelvic cavity All muscles on the face All muscles on the arm All muscles in the trunk All muscles in legs Anterior muscles in anatomical order Posterior muscles in anatomical order

60 L ITTLE R ED R IDING H OOD Read the Little Red Riding Hood story with your partner. Tell me which muscle is responsible for which movement. Use your notes to help you find the correct answers.


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