Changes

=='''Extensors'''==

=='''Extensors'''==

The craniolateral position on the forearm, almost all originate from the lateral epicondyle of the humerus. All innervated by the radial n. from the brachial plexus.

The craniolateral position on the forearm, almost all originate from the lateral epicondyle of the [[Bones and Cartilages - Horse Anatomy#Humerus|humerus]]. All innervated by the radial n. from the brachial plexus.

'''''Extensor carpi radialis'''''

'''''Extensor carpi radialis'''''

:The most medial

:The most medial

::'''Insertion''': Metacarpal tuberosity of the proximal third metacarpal (cannon) bone. Uniquely in the horse, the lacertus fibrosus (detachment of the ''biceps brachii'') joins this muscle prior to its insertion.  

::'''Insertion''': Metacarpal tuberosity of the proximal [[Bones and Cartilages - Horse Anatomy#Metacarpals and Metatarsals|third metacarpal]] (cannon) bone. Uniquely in the horse, the lacertus fibrosus (detachment of the ''biceps brachii'') joins this muscle prior to its insertion.  

::'''Action''': Extends and fixes the carpus, flexes the elbow

::'''Action''': Extends and fixes the carpus, flexes the elbow

'''''Extensor carpi obliquus''''' (aka '''''abductor pollicis longus''''')

'''''Extensor carpi obliquus''''' (aka '''''abductor pollicis longus''''')

:'''Origin''': Cranial radius

:'''Origin''': Cranial [[Bones and Cartilages - Horse Anatomy#Radius and Ulna|radius]]

:'''Insertion''': Head of second metacarpal (medial splint) bone

:'''Insertion''': Head of [[Bones and Cartilages - Horse Anatomy#Metacarpals and Metatarsals|second metacarpal]](medial splint) bone

   

   

'''''Common Digital Extensor'''''

'''''Common Digital Extensor'''''

: Deep to the ''extensor carpi radialis''

: Deep to the ''extensor carpi radialis''

:'''Insertion''': Extensor process of the distal phalanx via the [[Tendons - Horse Anatomy|common digital extensor tendon]].

:'''Insertion''': Extensor process of the [[Phalanges - Horse Anatomy#Distal Phalanx|distal phalanx]] via the [[Tendons - Horse Anatomy#Extensors|common digital extensor tendon]].

:'''Action''': Extends carpus and digit

:'''Action''': Extends carpus and digit

'''''Lateral Digital Extensor'''''

'''''Lateral Digital Extensor'''''

: Caudal to the ''common digital extensor'' muscle on the lateral antebrachium

: Caudal to the ''common digital extensor'' muscle on the lateral antebrachium

:'''Insertion''': Dorsoproximal phalanx via the [[Tendons - Horse Anatomy|lateral digital extensor tendon]].

:'''Insertion''': Dorsal [[Phalanges - Horse Anatomy#Proximal Phalanx|proximal phalanx]] via the [[Tendons - Horse Anatomy|lateral digital extensor tendon]].

:'''Action''': Extends the carpus and metacarpophalangeal (fetlock) joint

:'''Action''': Extends the carpus and metacarpophalangeal (fetlock) joint