Distortion of the hand and Hand Muscles Flashcards
What is the “ulnar claw”?
When extending fingers at rest, the 4th/5th digit remained flexed.
What type of lesion results in an ulnar claw?
Distal lesion of the ulnar nerve (fractured hook of the hamage)
What is “Pope’s Blessing”?
When the patient is asked to make a fist, the 1st/2nd/3rd fingers are unable to flex.
What type of lesion results in the pope’s blessing?
Lesion of the proximal median nerve (supracondylar fracture of the humerus)
What is the median claw?
When the patient is asked to extend their fingers, the 1st/2nd/3rd fingers are unable to extend.
What type of lesion results in a median claw?
distal median nerve lesion (carpal tunnel syndrome or wrist laceration)
What is the “OK gesture”?
When the patient is asked to make a fist, the 4th/5th fingers do not flex.
What type of lesion results in the OK gesture?
proximal ulnar nerve injury (Fracture of the medial epicondyle of the humerus)
What causes atrophy of the thenar eminence?
median nerve lesions
What is the presentation of atrophy of the thenar eminence?
unopposable thumb or “Ape hand”
What causes atrophy of the hypothenar eminence?
Ulnar nerve lesion
What are the muscles of the thenar eminence?
Remember OAF
- Opponens pollicis
- Abductor pollicis brevis
- Flexor Pollicis brevis
Actions are to Oppose, Abduct, and Flex
What are the muscles of the hypothenar eminence?
Recall OAF
- Opponens digiti minimi
- Abductor digiti minimi
- Flexor digiti minimi
Actions are to Oppose, Abduct, and Flex
What is the function of the dorsal interossei?
DAB
Dorsal Interossei ABduct
What is the function of the palmar interossei?
PAD
Palmar Interossei ADduct
