The Hand Flashcards
Grip that involves the long flexor muscles acting at the interphalangeal joints, the intrinsic muscles of the palm acting at the metacarpophalangeal joints and the extensors of the wrists.
Power grip
The power grip acts at what joints?
The radiocarpal and midcarpal joints
In the power grip, the engagement of the wrist extensors _______ (SHORTENS/LENGTHENS) the distance over which finger _______ (FLEXORS/EXTENSORS) work allowing a more powerful grip
Lengthens
Flexors
Grip that consumes less energy.
Involves the use of only the long finger flexors
Hook Grip
Grip that involves a change in the position of a handled object- required fine control of the thumb and fingers.
Precision handling grip
Precision handling grip has the wrist and fingers hold ____ (FIRMLY/LOOSELY) by the long flexors and extensors.
Firmly
What muscles perform the fine movements of the digits in the precision handling grip?
The hand muscles
Position used in casting of proximal wrist and forearm fractures.
The position of rest.
Fascia of the palm is continuous with the:
Antebrachial fascia and dorsal fascia of the hand
The fascia of the hand is thin where?
Over the thenar and hypothecate eminences
The fascia of the hand is thick where?
Centrally (palmar aponeurosis) and in the fingers. THIS is where it forms the digital sheath
What does the palmar aponeurosis cover?
The soft tissue of the palm.
Overlies the long flexor tendons
The palmar aponeurosis is continuous with:
The flexor retinaculum and palmaris longus tendon.
The palmar aponeurosis forms:
4 longitudinal bands as it radiates distally to the bases of the proximal phalanges and is continuous with the digital sheaths
Ligamentous tube that encloses synovial sheaths of both the deep and superficial flexor tendons and the FPL tendon
Fibrous digital sheaths
The fibrous digital sheaths are composed of:
5 annular and 4 cruciform parts
What forms mechanically complex structures?
Insertion of forearm and intrinsic hand muscle tendons from mechanically complex structures.
Tough septum extending from the medial border of the palmar aponeurosis to the 5th metacarpal
Medial fibrous septum
What is medial to the medial fibrous septum?
Hypothecate compartment
What does the hypothenar compartment contain?
The hypothenar muscles
Septum that extends from the lateral border of the aponeurosis to the 3rd metacarpal
Lateral fibrous septum
What is lateral to the lateral fibrous septum ?
Thenar compartment- contains the thenar muscles
Where does the central compartment exist
Between the medial and lateral compartments.
What does the central compartment contain?
The flexor tendons and their sheaths, the Lumbricals, the superficial palmar arterial arch and the digital arteries and nerves
Were is the adductor compartment located?
Deep to the thenar space.
Superficial to the interosseous muscles
What dos the adductor compartment contains
The adductor pollicis
What contains the interosseous muscles?
The interosseous compartment
Spaces bounded by the septa from the edges of the palmar aponeurosis to the metacarpals
Thenar and midpalmer spaces
What separates the thenar and midpalmar spaces?
The lateral fibrous septa
The midpalmar space is continuous with the:
Anterior compartment of the forearm via the carpal tunnel
What do the thenar and midpalmar spaces function as?
Bursa
Disease of the palmar fascia resulting in progressive thickening and contracture of fibrous bands on the palmar surface of the hand and fingers
Dupuytren’s Fasciitis and Contracture
Is Dupuytren’s Fasciitis more common in men or women?
Men
