Term
| Origin of Lumbricals 1 and2 |
|
Definition
| Lateral two tendons of flexor digitorum profundus (unipennate muscles) |
|
|
Term
| Insertion of Lumbricals 1 and 2 |
|
Definition
| Lateral sides of extensor expansions of digits 2-5 |
|
|
Term
| Innervation of Lumbricals 1 and 2 |
|
Definition
|
|
Term
| Action of Lumbricals 1 and 2 |
|
Definition
| Flex digits at metacarpophalngeal joints and extend interphalangeal joints |
|
|
Term
| Origin of Lumbricals 3 and 4 |
|
Definition
| Medial three tendons of flexor digitorum profundus (bipennate muscles) |
|
|
Term
| Insertion of Lumbricals 3 and 4 |
|
Definition
| Lateral sides of extensor expansions of digits 2-5 |
|
|
Term
| Innervation of Lumbricals 3 and 4 |
|
Definition
| Deep branch of ulnar nerve |
|
|
Term
| Action of Lumbricals 3 and 4 |
|
Definition
| Flex digits at metacarpophalangeal joints and extend interphalangeal joints |
|
|
Term
| Origin of Dorsal Interossei 1-4 |
|
Definition
| Adjacent sides of two metacarpals (bipennate muscles) |
|
|
Term
| Insertion of Dorsal Interossei 1-4 |
|
Definition
| Extensor expansions and bases of proximal phalanges of digits 2-4 |
|
|
Term
| Innervation of Dorsal Interossei 1-4 |
|
Definition
| Deep branch of ulnar nerve |
|
|
Term
| Action of Dorsal Interossei 1-4 |
|
Definition
| Abducts digits from axial line and act with lumbricals to flex metacarpophalangeal joints and extend interphalangeal joints |
|
|
Term
| Origin of Palmar Interossei 1-3 |
|
Definition
| Palmar surfaces of 2nd, 4th, and 5th metacarpals (unipennate muscles) |
|
|
Term
| Insertions of Palmar interossei 1-3 |
|
Definition
| Extensor expansions of digits and bases of proximal phalanges of digits 2, 4, and 5 |
|
|
Term
| Innervation of Palmar Interossei 1-3 |
|
Definition
| Deep branch of ulnar nerve |
|
|
Term
| Action of Palmar Interossei 1-3 |
|
Definition
| Adduct digits toward axial line and assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints |
|
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