Download - Slideshow: Forearm Deep Flexors
The Forearm
Deep Flexor Compartment
The forearm is the region of the upper limb between the elbow joint proximally and wrist joint distally
Deep Forearm Flexors
The forearm is the region of the upper limb between the elbow joint proximally and wrist joint distally
Elbow Joint
Deep Forearm Flexors
Deep Forearm Flexors
The forearm is the region of the upper limb between the elbow joint proximally and wrist joint distally
Elbow JointWrist Joint
Deep Forearm Flexors
The forearm is the region of the upper limb between the elbow joint proximally and wrist joint distally
Elbow JointWrist Joint
Forearm
Deep Forearm Flexors
There are two long bones in the forearm
Deep Forearm Flexors
There are two long bones in the forearm
Radius lies Laterally
Deep Forearm Flexors
There are two long bones in the forearm
Radius
Ulna lies Medially
Deep Forearm Flexors
The forearm is divided into 2 compartments by the Interosseous membrane and the Deep Fascia
Interosseous membrane
Deep Forearm Flexors
The forearm is divided into 2 compartments by the Interosseous membrane and the Deep Fascia
Anterior Compartment contains the • Superficial Flexors• Deep Flexors
Deep Forearm Flexors
The forearm is divided into 2 compartments by the Interosseous membrane and the Deep Fascia
Anterior Compartment contains the • Superficial Flexors• Deep Flexors
Posterior Compartment contains the • Extensors• Mobile Wad of Three
Deep Forearm Flexors
There are
3 Deep Flexors
Deep Forearm Flexors
Deep Flexors
1.Flexor Digitorum Profundus
2.Flexor Poliicis Longus
3.Pronator Quadratus
Deep Forearm Flexors
Deep Flexors
1.Flexor Digitorum Profundus
2.Flexor Poliicis Longus
3.Pronator Quadratus
In contrast to the superficial flexors,
all of these muscles arise distal to the elbow joint and
hence do not cause movement at the elbow joint
Deep Forearm Flexors
Deep Flexors
1.Flexor Digitorum Profundus
Arises from the proximal ¾ of the Ulna and the Interosseous Membrane
It inserts via slender tendons onto the distal phalanges of the fingers
It flexes the Distal Interphalangeal Joints (DIPJ)
Deep Forearm Flexors
Deep Flexors
2. Flexor Pollicis Longus
Arises from the Radius and the Interosseous Membrane
It inserts onto the distal phalanx of the thumb
It flexes the thumb Interphalangeal Joint (IPJ)
Deep Forearm Flexors
Deep Flexors
3. Pronator Quadratus
Arises from the Distal ¼ of Ulna
It inserts onto Distal ¼ of Radius
It pronates the forearm
Deep Forearm Flexors
Cross section through middle of forearm
Deep Forearm Flexors
Anterior or Volar Surface
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral MedialSubcutaneous Fat
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
Ulna
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
Ulna
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
UlnaRadius
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
UlnaRadius
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
UlnaRadius
Extensor Compartment
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
UlnaRadius
Extensor Compartment
Mobile Wad
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
UlnaRadius
Extensor Compartment
Deep FlexorMobile
Wad
Superficial Flexors
Deep Flexor
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
UlnaRadius
Extensor Compartment
Flexor Digitorum Profundus
Mobile Wad
Superficial Flexors
Deep Flexor
Deep Forearm Flexors
Anterior or Volar Surface
Posterior or Dorsal Surface
Lateral Medial
UlnaRadius
Extensor Compartment
Mobile Wad
Superficial Flexors
Flexor Pollicis Longus Flexor Digitorum Profundus
Deep Forearm Flexors
All Deep Flexors
1.Flexor Digitorum Profundus
2.Flexor Pollicis Longus
3.Pronator Quadratus
Supplied by the Anterior Interosseous Nerve(a branch of the Median Nerve)
EXCEPTLateral half of FDP which is supplied by Ulnar Nerve
Anterior Forearm
Flexor Digitorum Profundus
Origin Proximal 3/4 of medial and anterior surfaces of ulna and interosseous membrane
Insertion Base of the distal phalanges of digits 2 - 5
Action Flexes distal phalanges at distal interphalangeal joints of medial four digits; assists with flexion of hand
Nerve Supply Medial part: ulnar nerve; Lateral part: anterior interosseous branch of median nerve (C8 and T1)
Blood Supply Ulnar and anterior interosseous arteries
Anterior Forearm
Flexor Pollicis LongusOrigin Anterior surface of radius
and adjacent interosseous membrane
Insertion Base of distal phalanx of thumb
Action Flexes interphalangeal joint of 1st digit (thumb)
Nerve Supply Anterior interosseous nerve from median nerve (C8 and T1)
Blood Supply Anterior interosseous artery
Pronator QuadratusOrigin Distal 1/4 of anterior
surface of ulnaInsertion Distal 1/4 of anterior
surface of radiusAction Pronates forearmNerve Supply Anterior interosseous nerve
from median nerve (C8 and T1
Blood Supply Anterior interosseous artery
Anterior Forearm