Slide 1Slide 2Slide 3Slide 4Slide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Slide 13Slide 14Slide 15Slide 16Slide 17Slide 18Slide 19Slide 20Slide 21Slide 22Slide 23Slide 24Slide 25Slide 26KinesiologyKinesiologyKinesiologyKinesiologyPED 2440PED 2440MusclesMuscles•KEY POINTS:•Muscles only PULL on bones•Muscles only act on those joints which they cross•A muscle (usually) can not cause an opposite action (e.g. flexion and extension)•Origin = stable end; closer to the body•Insertion = movable end; further from the body 1. Pictures of the wrist and hand muscles•Look to the name of the muscle for help•KEY POINTS:•Muscles only PULL on bones•Muscles only act on those joints which they cross•A muscle (usually) can not cause an opposite action (e.g. flexion and extension)•Origin = stable end; closer to the body•Insertion = movable end; further from the body 1. Pictures of the wrist and hand muscles•Look to the name of the muscle for helpFlexor Carpi RadialisFlexor Carpi Radialis•Palmar surface•Origin: •medial condyle of the humerus•Insertion: •base of the 2nd and 3rd metacapals (palmar surface) •Actions:•flexion of the wrist•abduction of the wristflexion of the elbow•Palmar surface•Origin: •medial condyle of the humerus•Insertion: •base of the 2nd and 3rd metacapals (palmar surface) •Actions:•flexion of the wrist•abduction of the wristflexion of the elbowFlexor Carpi UlnarisFlexor Carpi Ulnaris•Palmar•Origin: •medial condyle of the humerus•Insertion: •pisiform, base of the 5th metacarpal•Actions: •flexion of the wrist•adduction of the wristflexion of the elbow•Palmar•Origin: •medial condyle of the humerus•Insertion: •pisiform, base of the 5th metacarpal•Actions: •flexion of the wrist•adduction of the wristflexion of the elbowPalmarisPalmaris•Palmar•Origin: •Medial epicondyle•Insertion: •Palmar aponeurosis of 2-5 metacarapls•Action: •flexion of the wristweak flexion of the elbow•Palmar•Origin: •Medial epicondyle•Insertion: •Palmar aponeurosis of 2-5 metacarapls•Action: •flexion of the wristweak flexion of the elbowFlexor Digitorum SuperficialisFlexor Digitorum Superficialis•Palmar•Origin: •medial condyle of the humerus•ulnar head - medial coronoid area•radial head - radial tuberosity area•Insertion: •split tendons attach to the sides of the middle phalanx of the four fingers•Actions: flexion of fingers, wrist and the elbow (weak)•Palmar•Origin: •medial condyle of the humerus•ulnar head - medial coronoid area•radial head - radial tuberosity area•Insertion: •split tendons attach to the sides of the middle phalanx of the four fingers•Actions: flexion of fingers, wrist and the elbow (weak)Flexor Digitorum ProfundusFlexor Digitorum Profundus• Palmar• Origin: – Upper, medial surface of the ulna• Insertion: – split tendons attach to distal phalanx of the four fingers• Actions: – flexion fingers and wristFlexor Pollicus LongusFlexor Pollicus Longus•Palmar•Origin: •middle anterior surface of the radius •Insertion:•base of the distal phalanx of the thumb (palmar surface) •Actions: flexion of wrist and thumb•Palmar•Origin: •middle anterior surface of the radius •Insertion:•base of the distal phalanx of the thumb (palmar surface) •Actions: flexion of wrist and thumbExtensor Carpi Radialis LongusExtensor Carpi Radialis Longus•Dorsal•Origin: •lateral condyle of the humerus•Insertion: •base of the 2nd metacarpal•Actions: •Extension of the wrist; •Abduction•Weak extension of the elbowNOTE: Extensor Carpi Radialis Brevis will not be covered•Dorsal•Origin: •lateral condyle of the humerus•Insertion: •base of the 2nd metacarpal•Actions: •Extension of the wrist; •Abduction•Weak extension of the elbowNOTE: Extensor Carpi Radialis Brevis will not be coveredExtensor Carpi UlnarisExtensor Carpi Ulnaris•Dorsal •Origin: •lateral epicondyle of the humerus•Insertion: •base of the 5th metacarpal•Actions: •Extension of the wrist •Adduction of the wristWeak extension of the elbow•Dorsal •Origin: •lateral epicondyle of the humerus•Insertion: •base of the 5th metacarpal•Actions: •Extension of the wrist •Adduction of the wristWeak extension of the elbowExtensor DigitorumExtensor Digitorum•Dorsal •Origin: •lateral epicondyle of the humerus•Insertion: •middle and distal phalanges of the four fingers•Actions: •Extension of the fingers•Extension of the wristWeak extension of the elbow•Dorsal •Origin: •lateral epicondyle of the humerus•Insertion: •middle and distal phalanges of the four fingers•Actions: •Extension of the fingers•Extension of the wristWeak extension of the elbowExtensor IndicisExtensor Indicis• Dorsal• Origin: – Distal, posterior ulna• Insertion: – middle and distal phalanxes of the second phalange• Actions: ––Extension of the 2Extension of the 2ndnd finger finger– Weak wrist extensionExtensor Digiti MinimiExtensor Digiti Minimi• Dorsal• Origin: – Lateral epicondyle of the humerus• Insertion: ––Base of the middle and distal Base of the middle and distal phalanxes of the 5phalanxes of the 5thth phalange phalange• Actions: ––Extension of the 5Extension of the 5thth finger finger– Weak wrist extensionExtensor Pollicis LongusExtensor Pollicis Longus•Dorsal•Origin: •posterior lateral surface of the distal ulna •Insertion: •base of the last phalanx of the thumb (dorsal side) •Actions: •Extension of the wrist•Extension of the thumbNOTE: The extensor pollicus brevis and the abductor pollicus will not be covered.•Dorsal•Origin: •posterior lateral surface of the distal ulna •Insertion: •base of the last phalanx of the thumb (dorsal side) •Actions: •Extension of the wrist•Extension of the thumbNOTE: The extensor pollicus brevis and the abductor pollicus will not be covered.SummarySummary•Table 7.1 except for the Extensor Carpi Radialis Brevis, Extensor Pollicus Brevis, and Abductor Pollicus Longus•Quiz–Bones–Joints and their Actions–Muscles•Location•Actions–Other info•Table 7.1 except for the Extensor Carpi Radialis Brevis, Extensor Pollicus Brevis, and Abductor Pollicus Longus•Quiz–Bones–Joints and their Actions–Muscles•Location•Actions–Other infoFlexionFlexion•Besides their actions, what do they have in common?–Flexor