Studied by 24 peopleWhat flexor muscles are in the deep layer?
Flexor Digitorum Profundus, Flexor Pollicis Longus
What flexor muscles are in the intermediate layer?
Flexor Digitorum Superficialis
What flexor muscles are in the superficial layer?
Flexor Carpi Ulnaris, Palmaris Longus, Flexor Carpi Radialis
The flexors of the wrist (carpus) and fingers (digits) take up most of the ______ compartment of the forearm, arising as a group from the medial ____, the upper ____ and ____, and the intervening ________ membrane.
anterior, epicondyle, radius, ulna, interosseous
FPL
Flexor pollicis longus
FDP
Flexor digitorum profundus
FDS
Flexor Digitorum Superficialis
The deep layer of muscles in the anterior forearm lie in contact with what?
The radius and ulna
In the deep layer of muscles in the anterior forearm, flexor pollicis longus lies in what half?
Radial
In the deep layer of muscles in the anterior forearm, flexor digitorum profundus lies in what half?
Ulnar
The superficial layer of muscles is seen just under the skin and thin ______ _______.
superficial fascia
The intermediate layer (flexor digitorum superficialis, FDS) exists between the _____ and _____ groups.
superficial, deep
Anterior
palmar
The tendons of FDS insert where?
On the sides of the middle phalanges
In the anterior (palmar) fingers, note how the tendons of FDS split at the level of the proximal phalanges, permitting…
the deeper (posterior) tendons of FDP to pass on through the bases of the distal phalanges.
What extensor muscles are in the deep layer?
Extensor Indicis, Extensor Pollicis Longus, Extensor Pollicis Brevis
What extensor muscles are in the superficial layer?
Extensor Carpi Ulnaris, Extensor Digiti Minimi, Extensor Digitorum, Extensor Carpi Radialis Longus, Extensor Carpi Radialis Brevis, Abductor Pollicis Longus
The extensors of the wrist and fingers arise from the ____ epicondyle and upper parts of the bones and interosseous membrane of the forearm, forming an _____ compartment on the _____ side of the forearm.
lateral, extensor, posterior
The wrist extensors insert on the distal carpal bones or metacarpals, while the finger extensors form what?
An expansion of tendon over the middle and distal phalanges to which the small intrinsic muscles of the hand insert
The wrist extensor muscles are critical to hand function. The power of the hand exists only with an…
extended wrist
The thenar eminence consists of what three muscles?
Opponens Pollicis, Abductor Pollicis Brevis, Flexor Pollicis Brevis
A palpable bulge of muscles just proximal to the thumb.
Thenar eminence
The thenar muscles ___ /___ in the same general area as one another; however, their different orientation orders different functions.
arise/insert
The hypothenar eminence consists of what muscles?
Opponens Digiti Minimi, Abductor Digiti Minimi, Flexor Digiti Minimi Brevis
The muscles in the hypothenar eminence move what digit?
The 5th
The muscles in the hypothenar eminence are complementary to the _____ muscles in ____ and _____.
thenar, attachment, function
What muscles are in the deep muscle group (intrinsics)?
Adductor Pollicis, Palmar Interosseus, Dorsal Interosseus, Lumbrical
What muscle in concert with the first dorsal interosseous muscle provides great strength in grasping an object between thumb and index finger?
Adductor pollicis
The ____ and ____ muscles insert into expanded finger extensor tendons forming a complex mechanism for flexing the _____ joints and extending the _____ joints.
interossei, lumbrical, metacarpophalangeal, interphalangeal
By flexing their phalangeal insertions, the interossei do what to certain digits?
abduct/adduct
Note
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