HAND : Muscles , nerves , Q's

Question 1

Thenar Compartment:
Location
Tendon
Nerve
Artery

Answer 1

Location:Lateral surface of palm , near base of thumb
Tendon: Flexor Pollicis Longus
Nerve : Recurrent Branch of Median Nerve
Artery: Princeps Pollicis Artery (Radial artery)

Question 2

Thenar Compartment
MUSCLES

Answer 2

Opponens Pollicis m.
Abductor Pollicis Brevis m.
Flexor Pollicis Brevis m.

Question 3

Opponens Pollicis m.
(Deepest) (Thenar Compartment)

Answer 3

A: Flexor Retinaculum, Tubercles of scaphoid and trapezium to the lateral side 1st metacarpal
MVMNT: To oppose thumb , draws 1st metacarpal medially to center palm and rotates it medially
Nerve: Recurrent Branch of Median N.

Question 4

Abductor Pollicis Brevis m.
(Lateral) (Thenar compartment)

Answer 4

A: Flexor Retinaculum, Tubercles of scaphoid and trapezium to lateral side of base of proximal phalanx of thumb
MVMNT: Abducts thumb , helps oppose it
Nerve: Recurrent Branch of Median N.

Question 5

Flexor Pollicis Brevis m.
(Medial) (Thenar compartment)

Answer 5

A: Flexor Retinaculum, Tubercles of scaphoid and trapezium to lateral side of base of proximal phalanx of thumb
MVMNT: Flexes thumb
Nerve: Recurrent Branch of Median Nerve

Question 6

Hypothenar Compartment:
Location
Tendon
Nerve
Artery

Answer 6

Location: Medial to fibrous septum, smaller proximal to base of 5th digit
Tendon: NONE
Nerve :
Deep Branch of Ulnar Nerve
Superficial Branch of Ulnar nerve
Proper Palmar Digital Nerve to 5th Digit
Artery: Proper Palmar Digital Artery

Question 7

Hypothenar Compartment
MUSCLES

Answer 7

Abductor Digiti Minimi m.
Flexor Digiti Minimi Brevis m.
Opponens Digiti Minimi m.
Palmaris Brevis m. (not primary)

Question 8

Abductor Digiti Minimi m.
(Hypothenar compartment)

Answer 8

A: Pisiform to medial side of base of proximal phalanx of 5th digit
MVMNT: Abducts 5th digit and assists in flexion of its proximal phalanx
Nerve: Deep Branch of Ulnar Nerve

Question 9

Flexor Digiti Minimi Brevis m.
(Hypothenar Compartment)

Answer 9

A: Hook of hamate and flexor retinaculum , to medial side of base of proximal phalanx of 5th digit
MVMNT: Flexes Proximal phalanx of 5th digit
Nerve: Deep Branch of Ulnar Nerve

Question 10

Opponens Digiti Minimi m.
(Hypothenar Compartment)

Answer 10

A: Hook of hamate and flexor retinaculum to medial border of 5th metacarpal
MVMNT: Draws 5th metacarpal anterior and rotates it , bringing 5th digit into opposition with thumb
Nerve: Deep Branch of Ulnar nerve

Question 11

** Palmaris Brevis m. **
(Hypothenar Compartment)

Answer 11

A: Flexor Retinaculum and Palmar aponeurosis to skin of hand
MVMNT: Tenses skin of palm on ulnar side and deepens hollow of palm, enhances grip by stabilizing skin of hypothenar eminence
COVERS AND PROTECTS ULNAR NERVE AND ARTERY
Nerve: Superficial Ulnar Nerve

Question 12

Central Compartment:
Location
Tendon
Nerve
Artery
Bursae

Answer 12

Location: Between hypothenar and thenar compartment and bounded anteriorly by palmar aponeurosis and contains flexor tendons + their sheaths

Tendon:
Flexor Digitorum Profundus
Flexor Digitorum Superficialis

Nerve:
Median Nerve
Deep Ulnar Nerve
Four Common Palmar Digital Nerves (3 off medial , 1 off ulnar)

Artery:
Superficial Palmar Arch A.
Deep Palmar Arch A.
Palmar Metacarpal A.
3 Common Palmar Digital A.

Bursae:
Ulnar Bursae
Radial Bursae

Question 13

Central Compartment:
MUSCLES

Answer 13

Lumericals m. (4 in total)

Question 14

Lumbricals m.
(1+2)
(central compartment)

Answer 14

A: Lateral two tendons of flexor digitorum profundus (as unipennate muscle) to lateral sides of extensor expansion of 2nd-5th digits
MVMNT:
Flex metacarpophalangeal joints ; extends interphalangeal joints of 2-5th digits
**(Extension PIP +DIP)
Nerve : MEDIAN NERVE

Question 15

Lumbricals m.
(3+4)
(Central Compartment)

Answer 15

A: Medial three tendons of flexor digitorum profundus (as bipennate muscles) , to lateral sides of extensor expansions of 2nd-5th digits
MVMNT:
Flex metacarpophalangeal joints ; extends interphalangeal joints of 2-5th digits
**Extension PIP +DIP)
Nerve: Deep Branch of Ulnar Nerve

Question 16

Adductor Compartment:
Location
Tendon
Nerve
Artery
Muscle

Answer 16

Location: Deep to thenar + central compartments
Tendon: NONE
Nerve: Deep Ulnar Nerve
Artery: NONE
Muscle: Adductor Pollicis m.

Question 17

Adductor Compartment:
MUSCLES

Answer 17

Adductor Pollicis M.

Question 18

Adductor Pollicis M.
(Adductor Compartment)

Answer 18

A:
OBLIQUE: Bases of 2nd and 3rd metacarpals , capitate, and adjacent carpals, medial side of base of proximal phalanx of thumb
TRANSVERSE: Anterior Surface of Shaft of 3rd metacarpal, medial side of base of proximal phalanx of thumb

MVMNT: Adducts thumb toward lateral border of palm

Nerve: Deep Branch of Ulnar Nerve

Question 19

Intermetacarpal Compartment
AKA
(Interosseous Compartment)
Location
Muscles
Nerves

Answer 19

Location : Between metacarpal bones
Muscles :
3 Palmar Interosseous
4 Dorsal Interosseous
Nerves:
Deep Ulnar Nerve

Question 20

Dorsal Interossei m. 1st-4th
(Intermetacarpal Compartment)

Answer 20

A: Adjacent sides of two metacarpals (as bipennate muscles) , to bases of proximal phalanx / extensor expansions of 2nd-4th digits

MVMNT:
Abduct 2nd-4th digits from axial line, act with lumbricals in flexing MCP and extending IP joints

Nerve: Deep Branch of Ulnar Nerve

Question 21

Palmar Interossei m. 1st-3rd
(Intermetacarpal Compartment)

Answer 21

A: Palmar surfaces of 2nd, 4th, and 5th metacarpals (as unipennate muscles) to bases of proximal phalanges / extensor expansions of 2nd , 4th, and 5th digits

MVMNT: Adduct 2nd, 4th, and 5th digits toward axial line , assist lumbricals in flexing MCP joints and extending IP joints , Extensor expansions of 2nd-4th digits

Nerve: Deep Branch of Ulnar nerve