2 1. Name the primary wrist flexors and extensors. flexor carpi radialisflexor carpi ulnarispalmaris longus3 wrist extensorsextensor carpi radialis longusextensor carpi radialis brevisextensor carpi ulnaris
3 2. What type of joint is the wrist? Condyloid-type joint
4 3. What is the degree of freedom for the wrist joint? Flexion – degreesExtension – degreesAbduction – degreesAdduction – degrees
5 4. Articulation of which bones makes the wrist joint? Articulation primarily occurs between the distal radius and the proximal carpal row (scaphoid, lunate, triquetrum)
6 5. Draw a diagram representing all the movement of the wrist joint and name the plane and axis of each movement.MovementPlaneAxisFlexion (palmar flexion)SagittalLateralExtension (dorsiflexion)Abduction (radial deviation, radial flexion)FrontalAnteroposteriorAdduction (ulnar deviation, ulnar flexion)
8 7. Name the ligaments of the metacarpophalangeal and interplalangeal joint. Interphalangeal JointCollateral LigamentPalmar LigamentMetacarpophalangeal JointCollatoral LigamentDeep Transverse Metacarpal Ligament
9 8. Name the movement demonstrated in the figure. Palmar Flexion
10 9. What is Carpal Tunnel Syndrome? Swelling & inflammation can cause increased pressure in carpal tunnel resulting in decreased function of median nerve leading to reduced motor & sensation function in its distributionparticularly common with repetitive use of the hand and wrist in manual labor and clerical work such as typing and keyboardingOften, slight modifications in work habits and hand & wrist positions during these activities can be preventativeFlexibility exercises for the wrist & finger flexors may be helpful
11 10. Name the ligaments of the wrist joint. The book said there were too numerous to mention in this discussion.
12 11. What is the normal range of? Wrist Flexion0 to ± 80 degreesWrist Extension0 to ± 70 degreesUlnar Deviation0 to 30 degreesRadial Deviation0 to 20 degrees
13 12. Name the ligament to be injured in hyperextension of the Proximal Interphalengreal Joint. Collateral Ligament
14 Muscle Origin Insertion Action Innervation Flexor Carpi RadialisMedial epicondyle of humerusBase of 2nd and 3rd metacarpals on palmar surface-Flexion of wrist-Abduction of wrist-Weak flexion of elbow-weak pronation of forearmMedian nerve (C6 and C7)Palmaris LongusPalmar aponeurosis of the 2nd, 3rd, 4th, and 5th metacarpalsFlexor Carpi UlnarisMedial epicondyle of humerus and posterior aspect of proximal ulnaBase of 5th metacarpal (palmar surface), pisiform, and hamate-Adduction of wristUlnar nerve(C8 and T1)
15 Muscle Origin Insertion Action Inner-vation Flexor Digitorum ProfundusProximal ¾ of anterior and medial ulnaBase of distal phalanges of four fingersFlexion of the four fingers at the metacarpo-phalangeal, proximal inter-phalangeal, and distal inter-phalangeal jointsMedian nerve (C8, T1) to 2nd and 3rd fingers; ulnar nerve (C8, T1) to 4th and 5th fingersFlexor Digitorum Superficialis-Medial epicondyle of humerus-Ulnar head: medial coronoid process-Radial head: upper 2/3 of anterior border of the radius just distal to the radial tuberosityEach tendon splits and attaches to the sides of middle phalanx of four fingers on palmar surface-Flexion of the fingers at the metacarpo-phalangeal and proximal inter-phalangeal joints-Flexion of wrist-Weak flexion of elbowMedian nerve (C7, C8, and T1)
16 Muscle Origin Insertion Action Innervation Extensor Carpi UlnarisLateral epicondyle of humerus and middle ½ of the posterior border of the ulnaqBase of 5th metacarpal on dorsal surface-Extension of wrist-Adduction of wrist-Weak extension of elbowRadial nerve(C6, C7, and C8)Extensor Carpi Radialis BrevisLateral epicondyle of humerusBase of 3rd metacarpal on dorsal surface-Abduction of wrist-Weak flexion of elbow(C6 and C7)
17 14. How can you strengthen the flexor carpi ulnaris muscle? The flexor carpi ulnaris is important in wrist flexion or curling activities. It is one of only two muscles involved in wrist adduction or ulnar flexion. It may be strengthened with any type of wrist-curling activity against resistance.
18 15. If ulnar nerve gets injured the which movement is likely to be affected? The ulnar nerve assists the flexor carpi ulnaris inFlexion of the wristAdduction of the wristWeak flexion of the elbowtherefore these movements would be most affected if the ulnar nerve gets injured.
19 16. If there is contracture of wrist flexors then which movement will not take place in its full range?Opposition will not take place in its full range of motion.
20 17. During the concentric contraction of wrist flexors, which type of contraction will take place in wrist extensors?Eccentric Contraction
21 18. If you hold a cup tightly then which type of contraction occurs? Isometric Contraction
22 19. Which movement is demonstrated in the figure? A – wrist flexion B – wrist extension