Arm vs. Forearm - What's the difference?

Main Difference

The main difference between Arm and Forearm is that the forearm and upper arm together and Forearm is a part of the body.

Wikipedia

  • Arm

    In human anatomy, the arm is the part of the upper limb between the glenohumeral joint (shoulder joint) and the elbow joint. In common usage, the arm extends to the hand. It can be divided into the upper arm, which extends from the shoulder to the elbow, the forearm which extends from the elbow to the hand, and the hand. Anatomically the shoulder girdle with bones and corresponding muscles is by definition a part of the arm. The Latin term brachium may refer to either the arm as a whole or to the upper arm on its own.

  • Forearm

    The forearm is the region of the upper limb between the elbow and the wrist. The term forearm is used in anatomy to distinguish it from the arm, a word which is most often used to describe the entire appendage of the upper limb, but which in anatomy, technically, means only the region of the upper arm, whereas the lower "arm" is called the forearm. It is homologous to the region of the leg that lies between the knee and the ankle joints, the crus. The forearm contains two long bones, the radius and the ulna, forming the radioulnar joint. The interosseous membrane connects these bones. Ultimately, the forearm is covered by skin, the anterior surface usually being less hairy than the posterior surface. The forearm contains many muscles, including the flexors and extensors of the digits, a flexor of the elbow (brachioradialis), and pronators and supinators that turn the hand to face down or upwards, respectively. In cross-section the forearm can be divided into two fascial compartments. The posterior compartment contains the extensors of the hands, which are supplied by the radial nerve. The anterior compartment contains the flexors, and is mainly supplied by the median nerve. The flexor muscles are more massive than the extensors, because they work against gravity and act as anti-gravity muscles. The ulnar nerve also runs the length of the forearm. The radial and ulnar arteries and their branches supply the blood to the forearm. These usually run on the anterior face of the radius and ulna down the whole forearm. The main superficial veins of the forearm are the cephalic, median antebrachial and the basilic vein. These veins can be used for cannularisation or venipuncture, although the cubital fossa is a preferred site for getting blood.

Wiktionary

  • Arm (noun)

    The portion of the upper human appendage, from the shoulder to the wrist and sometimes including the hand.

    "She stood with her right arm extended and her palm forward to indicate “Stop!”"

  • Arm (noun)

    The extended portion of the upper limb, from the shoulder to the elbow.

    "The arm and forearm are parts of the upper limb in the human body."

  • Arm (noun)

    A limb, or locomotive or prehensile organ, of an invertebrate animal.

    "the arms of an octopus"

  • Arm (noun)

    A long, narrow, more or less rigid part of an object extending from the main part or centre of the object, such as the arm of an armchair, a crane, a pair of spectacles or a pair of compasses.

    "The robot arm reached out and placed the part on the assembly line."

  • Arm (noun)

    A bay or inlet off a main body of water.

    "Shelburne Bay is an arm of Lake Champlain."

  • Arm (noun)

    A branch of an organization.

    "the cavalry arm of the military service"

  • Arm (noun)

    Power; might; strength; support.

    "the arm of the law"

    "the secular arm"

  • Arm (noun)

    A pitcher

    "The team needs to sign another arm in the offseason."

  • Arm (noun)

    One of the two parts of a chromosome.

  • Arm (noun)

    A group of patients in a medical trial.

  • Arm (noun)

    A weapon.

  • Arm (noun)

    heraldic bearings or insignia

    "The Duke's arms were a sable gryphon rampant on an argent field."

  • Arm (verb)

    To take by the arm; to take up in one's arms.

  • Arm (verb)

    To supply with arms or limbs.

  • Arm (verb)

    To supply with armour or (later especially) weapons.

  • Arm (verb)

    To prepare a tool or a weapon for action; to activate.

    "Remember to arm an alarm system."

  • Arm (verb)

    To cover or furnish with a plate, or with whatever will add strength, force, security, or efficiency.

    "to arm the hit of a sword; to arm a hook in angling"

  • Arm (verb)

    To furnish with means of defence; to prepare for resistance; to fortify, in a moral sense.

  • Arm (verb)

    To fit (a magnet) with an armature.

  • Arm (adjective)

    Poor; lacking in riches or wealth.

    "He's neither poor nor arm."

  • Arm (adjective)

    To be pitied; pitiful; wretched.

  • Forearm (noun)

    The part of the arm between the wrist and the elbow.

  • Forearm (noun)

    A section of the weapon between the receiver and the muzzle, used to hold the firearm steady.

  • Forearm (verb)

    To arm in preparation.

Webster Dictionary

  • Arm (noun)

    The limb of the human body which extends from the shoulder to the hand; also, the corresponding limb of a monkey.

  • Arm (noun)

    Anything resembling an arm

  • Arm (noun)

    Fig.: Power; might; strength; support; as, the secular arm; the arm of the law.

  • Arm (noun)

    A branch of the military service; as, the cavalry arm was made efficient.

  • Arm

    To take by the arm; to take up in one's arms.

  • Arm

    To furnish with arms or limbs.

  • Arm

    To furnish or equip with weapons of offense or defense; as, to arm soldiers; to arm the country.

  • Arm

    To cover or furnish with a plate, or with whatever will add strength, force, security, or efficiency; as, to arm the hit of a sword; to arm a hook in angling.

  • Arm

    Fig.: To furnish with means of defense; to prepare for resistance; to fortify, in a moral sense.

  • Arm (verb)

    To provide one's self with arms, weapons, or means of attack or resistance; to take arms.

  • Forearm

    To arm or prepare for attack or resistance before the time of need.

  • Forearm (noun)

    That part of the arm or fore limb between the elbow and wrist; the antibrachium.

Princeton's WordNet

  • Arm (noun)

    a human limb; technically the part of the superior limb between the shoulder and the elbow but commonly used to refer to the whole superior limb

  • Arm (noun)

    any instrument or instrumentality used in fighting or hunting;

    "he was licensed to carry a weapon"

  • Arm (noun)

    an administrative division of some larger or more complex organization;

    "a branch of Congress"

  • Arm (noun)

    any projection that is thought to resemble an arm;

    "the arm of the record player"

    "an arm of the sea"

    "a branch of the sewer"

  • Arm (noun)

    the part of an armchair or sofa that supports the elbow and forearm of a seated person

  • Arm (noun)

    the part of a garment that is attached at armhole and provides a cloth covering for the arm

  • Arm (verb)

    prepare oneself for a military confrontation;

    "The U.S. is girding for a conflict in the Middle East"

    "troops are building up on the Iraqui border"

  • Arm (verb)

    supply with arms;

    "The U.S. armed the freedom fighters in Afghanistan"

  • Forearm (noun)

    the part of the superior limb between the elbow and the wrist

  • Forearm (verb)

    arm in advance of a confrontation

Illustrations

Arm

Forearm

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