[스크랩] 상완 삼두근(triceps brachii)

1. 흔히 목디스크, 상부교차증후군으로 근육긴장이 있을때 상완삼두근 사이의 요골신경의 포착됨

2. medial head, lateral head, long head 세분지가 있음. 

3. 많은 상완삼두근 운동법

panic bird..

The long head arises from the infraglenoid tubercle of the scapula. It extends distally anterior to the teres minor and posterior to the teres major.^[1]

Horizontal section of upper arm. Triceps muscle shown in green text.

The medial head arises distally from the groove of the radial nerve; from the dorsal (back) surface of the humerus; from the medial intermuscular septum; and its distal part also arises from the lateral intermuscular septum. The medial head is mostly covered by the lateral and long heads, and is only visible distally on the humerus.^[1]

The lateral head arises from the dorsal surface of the humerus, lateral and proximal to the groove of the radial nerve, from the greater tubercledown to the region of the lateral intermuscular septum.^[1]

Each of the three fascicles has its own motorneuron subnucleus in the motor column in the spinal cord. The medial head is formed predominantly by small type I fibers and motor units, the lateral head of large type IIb fibers and motor units and the long head of a mixture of fiber types and motor units.^[2][3] It has been suggested that each fascicle "may be considered an independent muscle with specific functional roles."^[2]

The fibers converge to a single tendon to insert onto the olecranon process of the ulna (though some research indicates that there may be more than one tendon)^[4] and to the posterior wall of the capsule of the elbow joint where bursae (cushion sacks) are often found. Parts of the common tendon radiates into the fascia of the forearm and can almost cover the anconeus muscle.^[1]

Innervation[edit]

All three heads of the triceps brachii are classically believed to be innervated by the radial nerve.^[5] However, a study conducted in 2004 determined that, in 20 cadaveric specimens and 15 surgical dissections on participants, the long head was innervated by a branch of the axillary nerve in all cases.^[6]

Variation[edit]

A tendinous arch is frequently the origin of the long head and the tendon of latissimus dorsi. In rare cases, the long head can originate from the lateral margin of the scapula and from the capsule of the shoulder joint.^[1]

Function[edit]

The triceps is an extensor muscle of the elbow joint and an antagonist of the biceps and brachialis muscles. It can also fixate the elbow joint when the forearm and hand are used for fine movements, e.g., when writing. It has been suggested that the long head fascicle is employed when sustained force generation is demanded, or when there is a need for a synergistic control of the shoulder and elbow or both. The lateral head is used for movements requiring occasional high-intensity force, while the medial fascicle enables more precise, low-force movements.^[2]

With its origin on the scapula, the long head also acts on the shoulder joint and is also involved in retroversion and adduction of the arm.^[1]

상완삼두근 트레이닝

The triceps can be worked through either isolation or compound elbow extension movements and can contract statically to keep the arm straightened against resistance.

Isolation movements include cable push-downs, lying triceps extensions and arm extensions behind the back. 

1) cable push-downs

2) lying triceps extension

3. arm extensions behind the back

Examples of compound elbow extension include pressing movements like the push up, bench press, close grip bench press (flat, incline or decline), military press and dips. A closer grip targets the triceps more than wider grip movements.

- 그립을 넓히는 것보다 좁히는 것이 좀더 상완 삼두근 트레이닝

1) push up

2. bench press

3) military press 

4) dips exercise

chair dips

Static contraction movements include pullovers, straight-arm pulldowns and bent-over lateral raises, which are also used to build the deltoids and latissimus dorsi.

1) pullovers exercise

2) straight-arm pulldowns

3) bent-over lateral raises

Elbow extension is important to many athletic activities. As the biceps is often worked more for aesthetic purposes, this is usually a mistake for fitness training. While it is important to maintain a balance between the biceps and triceps for postural and effective movement purposes, what the balance should be and how to measure it is disputed. Pushing and pulling movements on the same plane are often used to measure this ratio.

임상적 이용

- dtr 검사

상완삼두근 Trp 탐구

에반스의 상완삼두근 isolated stretching

상완삼두근 단관절 근육(내외측두)와 ancneus 스트레칭

출처 : 치료적 맞춤운동 연구소(CMP therapy 암치유 탐구)

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