For the ulnar nerve stimulation is given at wrist medial/lateral to flexor carpi ulnaris
(FCU) and the active ring electrode is placed over the proximal interphalangeal joint of the fifth digit.
The flexor carpi ulnaris
muscle (FCUM), positioned most medially in the forearm, belongs to the superficial flexor group of muscles (5).
This position was found at the belly of the muscle, on the upper part of the forearm, which is formed by the following muscles: brachioradialis, palmaris longus, flexor carpi radialis, flexor carpi ulnaris
, extensor carpi radialis longus, and extensor carpi ulnaris
The calcium deposition of the flexor carpi ulnaris
is the most common form of ACT that affects the hand and wrist .
In the forearm, the first musclc innervated by the ulnar nerve is the flexor carpi ulnaris
(FCU) followed by the ulnar half (ring and little finger) of the flexor digitorum profundus (FDP D4-D5).
The bird was restrained in dorsal recumbency, the wing was spread a part and after cleansing the sampling site with an antiseptic, the blood samples were drawn through basilica vein (venacutanea ulnaris
superficialis) in the disposable syringe, using the safety clothes and gloves to avoid any contamination (Samour et al., 2010).
A 5 mL volume of venous blood was collected from the ulnaris
vein in the wing of one bird taken from each replicate.
After cleaning the site, an electrode (distal) was positioned at the point where the proximal flexor line of the wrist crosses the radial side of the flexor carpi ulnaris
; the proximal electrode was placed 3-4 cm away from the first one, on the ulnar nerve area.
It is located between the flexor carpi ulnaris
medially and the flexor carpi radialis laterally.
Turner, "Absence of extensor carpi ulnaris
and presense of an accessory sural muscle," Journal of Anatomy and Physiology, vol.
 proposed an idea to estimate the wrist-flexion force from sEMG signals obtained from electrodes on the flexor carpi ulnaris
muscle using ANN during an action.
Carpometacarpal articulation Muscular attachment Trapezoid and second metacarpal Flexor carpi radialis Extensor carpi radialis longus Capitate and third metacarpal Extensor carpi radialis brevis Hamate and fourth metacarpal Nil Hamate and fifth metacarpal Extensor carpi ulnaris
Flexor carpi ulnaris