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Forearm, Wrist, Hand

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lizzielizzie
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Last updated: May 27, 2026
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First submittedMay 27, 2026
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Average score7.6%
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Hint
Answer
Main stabilising Bone of the forearm that does NOT articulate at wrist joint
Ulna
Rotates over stationary forearm bone
Radius
Proximal row of carpal bones (SLTP)
Scaphoid, Lunate, Triquetrum, Pisiform
Distal row of carpals (HCTT)
Hamate, Capitate, Trapezoid, Trapezium
Risk of Scaphoid Fracture, especially in 10% of people who don't receive retrograde blood supply (distal to proximal flow)
Avascular Necrosis
 
 
True Wrist Joint + type
Radiocarpal joint - Condyloid synovial
Other wrist joints (4)
Distal radioulnar joint
Other wrist joints
Midcarpal joint
Other wrist joints
Intercarpal Joint
Other wrist joints
Carpometacarpal Joint
 
 
How many bones in the hand
19
What type of joint is the MCP (metacarpophalangeal)
Condyloid synovial
What type of joints are the Proximal + distal interphalangeal joints (PIP,DIP)
Hinge synovial
 
 
Hand Ligaments that stabilise joints and firmly attach to deep transverse metacarpal ligament AKA volar
Palmar ligaments/plates
Hand ligaments that resist separation of metacarpals
Deep transverse metacarpal
Hand ligaments that stabilise MCP + IP joints, and are taught in flexion
Collateral ligaments
 
 
Other name for wrist adduction
Ulnar Deviation
Other name for wrist abduction
Radial Deviation
 
 
Anterior muscles of forearm function
Flexion
Posterior muscles of forearm function
Extension
Innervation of Anterior flexor compartment apart from 1.5 muscles
Median nerve
Innervation of Posterior extensor compartment
Radial nerve
Where all Anterior superficial + intermediate layer muscles arise from
Common flexor tendon at medial epicondyle of humerus
Where 4 Posterior superficial layer muscles arise from
Common Extensor tendon at lateral epicondyle of humerus
Which 2 don't arise from there
Brachioradialis, Extensor Carpi Radialis Longus
Posterior muscles of forearm function
Extension
 
 
Anterior Superficial layer muscles (4)
Pronator Teres
Anterior Superficial layer muscles
Flexor Carpi Radialis
Anterior Superficial layer muscles
Palmaris Longus
Anterior Superficial layer muscles
Flexor Carpi Ulnaris
Anterior Intermediate layer muscle (1)
Flexor Digitorum Superficialis
Anterior Deep layer muscles (3)
Flexor Digitorum Profundus
Anterior Deep layer muscles
Flexor Pollicis Longus
Anterior Deep layer muscles
Pronator Quadratus
 
 
Posterior Superficial Layer muscles (6)
Brachioradialis
Posterior Superficial Layer
Extensor Carpi Radialis Longus
Posterior Superficial Layer
Extensor Carpi Radialis Brevis
Posterior Superficial Layer
Extensor Digitorum
Posterior Superficial Layer
Extensor Digiti Minimi
Posterior Superficial Layer
Extensor Carpi Ulnaris
 
 
Posterior Deep Layer muscles (5)
Supinator
Posterior Deep Layer
Extensor Indicis
Posterior Deep Layer
Abductor Pollicis Longus
Posterior Deep Layer
Extensor Pollicis Brevis
Posterior Deep Layer
Extensor Pollicis Longus
 
 
5 muscle groups of the hand
Thenar, Hypothenar, Adductor, Central, Interosseus
Hint
Answer
Muscles in Thenar (3)
Abductor pollicis brevis
Muscles in Thenar
Flexor pollicis brevis
Muscles in Thenar
Opponens pollicis
 
 
Muscles in Hypothenar (3)
Abductor digiti minimi
Muscles in Hypothenar
Flexor digiti minimi brevis
Muscles in Hypothenar
Opponens digiti minimi
 
 
Muscle in Adductor
Adductor Pollicis
Central muscles (2)
Long flexor tendons, lumbrical muscles
Interosseous muscles
interossei
 
 
Where does the thenar originate
base of thumb
Where does the hypothenar originate
base of little finger
Where do the lumbricals originate
flexor tendons
Where do the interossei originate
metacarpal bones
What quadratic muscle is around the hypothenar but not part of these groups, and originates from the dermis?
Palmaris brevis
 
 
Innervation of Thenar
recurrent branch of median nerve
Innervation of Hypothenar
deep branch of ulnar nerve
PAD DAB
Palmar Adduct, Dorsal Abduct
Only intrinsic hand muscles not innervation by deep ulnar nerve but by median?
1st and 2nd lumbrical
Symptom of severe carpal tunnel due to compression of median nerve
Wasting of thenar eminence
 
 
Superficial veins of upper limb (3)
Cephalic, Basilic, Median Cubital Vein
Deep veins of upper limb
Brachial veins
Where cephalic vein originates, goes via and drains into
lateral dorsal venous arch, deltopectoral groove, axillary vein at clavipectoral triangle
Where basilic vein originates and where it becomes axillary vein
Medial Dorsal Venous arch, lower border of teres major
Where does brachial artery bifurcate
neck of radius
What ulnar artery is deep to
Pronator teres
Branches of ulnar artery
Common interosseus, Anterior + posterior interosseus
What radial artery is deep to
Brachioradialis
What mostly composes superficial palmar arch arterial supply
Ulnar
What mostly composes deep palmar arch arterial supply
Radial
Vein and Artery that go via anatomical snuffbox
Cephalic, radial
 
 
What muscles radial nerve innervates
posterior arm and forearm
What skin radial nerve innervates
posterior + inferolateral arm, posterior forearm, lateral dorsal hand, dorsal lateral 3.5 fingers
 
 
radial nerve origin
posterior cord C5-T1
Ulnar nerve origin
medial cord C8-T1
median nerve origin
lateral and medial cords C5/6-T1
 
 
Median nerve innervates which muscle compartment other than flexor carpi ulnaris + ulnar half of flexor digitorum profundus
Ant compartment
Median nerve innervates which muscles
Thenar eminence
Median nerve innervates which muscles
first 2 lumbricals
Median nerve innervates what skin
lateral half of palm + lateral 3.5 fingers
 
 
Ulnar nerve innervates what muscles
FCU, medial FDP, other intrinsic hand muscles
Ulnar nerve innervates what skin
medial dorsal and palmar aspect of palm and medial 1.5 fingers
 
 
Contents of Carpal Tunnel (4)
Flexor pollicis longus
Contents of Carpal Tunnel
Flexor digitorum superficialis
Contents of Carpal Tunnel
Flexor digitorum profundus
Contents of Carpal Tunnel
Median nerve
What the Cubital Tunnel contains
Ulnar nerve
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