origin - medial epicondyle humerus, olecranon ulnainsertion - pisiform bone, hook, 5th metacarpalinnervation - ulnar nerveblood supply - posterior ulnar recurrent arteryaction - flexes and adduct hand at wrist

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1.
origin - medial epicondyle humerus, olecranon ulna

insertion - pisiform bone, hook, 5th metacarpal

innervation - ulnar nerve

blood supply - posterior ulnar recurrent artery

action - flexes and adduct hand at wrist