In all animals, the motor unit of skeletal muscle consists of the motor neuron, the neuromuscular junction, and muscle fibers. Muscle dysfunction—such as ataxia, paresis, or paralysis—most commonly originates in which of the following locations?

The nervous system
The neuromuscular junction
The muscle
The skeleton

Disorders of the Pastern and Fetlock

Matthew T. Brokken

, DVM, The Ohio State University

Last full review/revision Sep 2015 | Content last modified Oct 2015

Disorders of the pastern and fetlock include fractures and a number of inflammatory conditions.

Thrush in Horses

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Fractures of the First and Second Phalanx in Horses

Lameness in Horses

Overview of Lameness in Horses

The Lameness Examination in Horses

Imaging Techniques in Equine Lameness

Arthroscopy in Equine Lameness

Regional Anesthesia in Equine Lameness

Disorders of the Foot in Horses

Osseous Cyst-like Lesions in the Distal Phalanx in Horses

Bruised Sole and Corns in Horses

Canker in Horses

Fracture of Navicular Bone in Horses

Fracture of Distal Phalanx in Horses

Keratoma in Horses

Laminitis in Horses

Navicular Disease in Horses

Pedal Osteitis in Horses

Puncture Wounds of the Foot in Horses

Pyramidal Disease in Horses

Quittor in Horses

Quarter Crack in Horses

Scratches in Horses

White Line Disease in Horses

Sheared Heels in Horses

Sidebone in Horses

Thrush in Horses

Disorders of the Pastern and Fetlock

Fractures of the First and Second Phalanx in Horses

Fractures of the Proximal Sesamoid Bones in Horses

Osteoarthritis of the Proximal Interphalangeal Joint in Horses

Palmar/Plantar Metacarpal/Metatarsal Nonadaptive Bone Remodeling in Horses

Sesamoiditis in Horses

Chronic Proliferative Synovitis in Horses

Digital Sheath Tenosynovitis in Horses

Disorders of the Metacarpus in Horses

Tendinitis in Horses

Suspensory Desmitis in Horses

Inferior Check Desmitis in Horses

Bucked Shins in Horses

Exostoses of the Second and Fourth Metacarpal Bones in Horses

Fractures of the Small Metacarpal (Splint) Bones in Horses

Fracture of the Third Metacarpal (Cannon) Bone in Horses

Disorders of the Carpus in Horses

Fracture of the Carpal Bones in Horses

Subchondral Bone Disease of the Third Carpal Bone in Horses

Tearing of the Medial Palmar Intercarpal Ligament in Horses

Osteoarthritis of the Carpus in Horses

Distal Radial Exostosis and Osteochondroma of the Distal Radius in Horses

Carpal Hygroma in Horses

Rupture of the Common Digital Extensor Tendon in Horses

Disorders of the Shoulder in Horses

Developmental Diseases of the Shoulder in Horses

Fractures of the Shoulder in Horses

Bicipital Bursitis in Horses

Infection of the Shoulder in Horses

Suprascapular Neuropathy in Horses

Osteoarthritis of the Shoulder in Horses

Disorders of the Elbow in Horses

Developmental Orthopedic Disease in the Elbow of Horses

Fractures of the Elbow in Horses

Osteoarthritis of the Elbow in Horses

Collateral Ligament Injury in the Elbow of Horses

Disorders of the Metatarsus in Horses

Bucked Shins/Dorsal Cortical Fractures of the Third Metatarsal Bone in Horses

Exostoses of the Metatarsal Bones in Horses

Diaphyseal Fracture of the Third Metatarsal Bone in Horses

Incomplete Longitudinal Fractures of the Plantar Aspect of the Third Metatarsal Bone in Horses

Focal Bone Reaction and Avulsion Fractures of the Third Metatarsal Bone in Horses

Fractures of the Second and Fourth Metatarsal Bones in Horses

Enostosis-like Lesions of the Third Metatarsal Bone in Horses

Disorders of the Tarsus in Horses

Failure of Ossification of the Distal Tarsal Bones in Horses

Osteoarthritis of the Distal Tarsal Joints in Horses

Osteoarthritis of the Talocalcaneal Joint in Horses

Osteoarthritis of the Tarsocrural Joint in Horses

Synovitis/Capsulitis of the Tarsocrural Joint in Horses

Osteochondrosis of the Tarsocrural Joint in Horses

Osteitis of the Calcaneus in Horses

Fractures of the Distal Tarsal Bones in Horses

Fracture of the Talus in Horses

Fracture of the Fibular Tarsal Bone (Calcaneus) in Horses

Fracture of the Lateral Malleolus of the Tibia in Horses

Tarsal Joint Luxation in Horses

Desmitis of the Collateral Ligaments of the Tarsus in Horses

Rupture of the Fibularis (Peroneus) Tertius in Horses

Stringhalt

Curb in Horses

Disorders of the Tarsal Sheath in Horses

False Thoroughpin in Horses

Luxation of the Superficial Digital Flexor Tendon from the Tuber Calcanei in Horses

Gastrocnemius Tendinitis in Horses

Calcaneal Bursitis in Horses

Capped Hock

Disorders of the Stifle in Horses

Osteochondrosis of the Stifle in Horses

Subchondral Cystic Lesions in Horses

Meniscus and Meniscal Ligament Injuries in Horses

Cranial and Caudal Cruciate Ligament Injuries in Horses

Collateral Ligament Injuries in Horses

Intermittent Upward Fixation of the Patella and Delayed Patella Release in Horses

Fragmentation of the Patella in Horses

Patellar Luxation in Horses

Disorders of the Fetlock and Pastern in Horses

Disorders of the Tarsus in Horses

Disorders of the Foot in Horses

The nervous system
The neuromuscular junction
The muscle
The skeleton

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