METACARPOPHALANGEAL JOINT

 

Joint animation

DESCRIPTION: The articular surfaces of this joints are the heads of metacarpals I to V and the bases of the proximal phalanges of the five fingers (digits).

LIGAMENTS:

The palmar ligaments are attached to the deep transverse metacarpal ligaments which are three bands interconnecting them (palmar ligaments) to each other.

NERVE SUPPLY:

BLOOD SUPPLY: Superficial and deep palmar arch.

MOVEMENTS:

         Flexion: All the tendons that cross the joints assist in flexionflexor digitorum superficialis and flexor digitorum profundus.

         Extension: All the extensor tendons that cross the joint participate in  extending that joint- extensor digitorum, extensor indicis, extensor digiti minimi and extensor pollicis longus.

         Abduction by dorsal interosseous (I-V).

         Adduction by palmar interossei (I-IV).

         Rotation- this is mainly due to gliding of the joints.

         Circumduction is a combination of the above movements.

         Precision grip. This is the position in which the metacarpophalangeal joints are all flexed while the interphalangeal joints are extended and it is due to the accommodation of the lumbricals and interossei on the extensor expansion at the back of the joints.

Gallery

Extension

Flexion

Abduction

Adduction

Skin

Interior

Interior

Bones

 


Bones of hand and wrist

 

 

 

 

 

 

 

 

Introduction
Histology

Embryology
Gross anatomy
Organ integration
Clinical anatomy

Quiz

Physiology

Biochemistry

Chemical Pathology

Anatomical Pathology

Pharmacology

Imaging

Medicine

Surgery

Main Subject Course Links

eAnatomy eAnesthesia eBiochemistry eChemical pathology eCommunity Health
eDermatology eENT eGynecology eHematology eImaging
eMedicine eMedical microbiology eObstetrics eOphthalmology ePathology
ePediatrics ePharmacology ePhysiology ePsychiatry    eSurgery/eOrthopedics
eLab eOSCE eProcedures eInvestigations eSchool/Videopage
eOrgans eLocator Anatomy Museum eDissector eFractures/Dissect-it-yourself
All diseases eClerking eTreatment eDoctor ePatient

 

 

 

Electronic School of Medicine
Creator: Oluwole Ogunranti