scapula muscle-fast and easy explanation

what is scapula muscle

scapula muscle: A scapula or blade on the shoulder is a bone that connects the clavicle to the humerus. The
scapula forms the front arm of the shoulder girdle. Strong, flat, triangular bone. The scapula
provides attachment to several muscle groups. The deep scapula muscles include the
rotator cuff muscles, large teres, subscapularis, small teres, and infraspinatus. These
muscles attach to the scapular surface and help with capturing and rotating the outer and
inner glenohumeral joints. External muscles include the triceps, biceps, and deltoid. The third
group of muscles is the levator scapulae, trapezius, rhomboids, and serratus anterior.
These muscles are responsible for the circulation and strength of the spinal cord.


This muscle looks like a triangle and serves as an attachment for many 17 bones

key facts

1.Border
Higher, side and average or middle
2.Angles
Lateral, high and low
3.Places
Anterior: subscapular fossa
Main: Excellent fossa, spine, infraspinous fossa
4.Procedures
Coracoid, acromion


What does this muscle contraction involve?


These muscles are from the rib cage (axial skeleton) and attach to the scapula, and can be
called the Axial Scapular Muscle. These muscles are responsible for the movement of the
scapula and the shoulder girdle (sometimes called the scapulothoracic joints, but are
actually the joint movements of the sternoclavicular and acromioclavicular joints ).


Embryology


The scapula initiates osteogenic development by endochondral ossation at week 11 of
human embryogenesis. This occurs after the 10th week of humerus development, during which
it will form a glenohumeral joint.


Function:-


The scapula is an important bone in the function of the shoulder blades. It comes in 6 types
of motion, which allows for a full range of active movements including, outflow, height,
pressure, rotation, and downward rotation. Protraction is performed by the actions of the
serratus anterior, large pectoralis, and small pectoralis muscles.


Retraction is performed by the actions of the trapezius, rhomboid, and latissimus dorsi
muscles. The elevation is achieved by the trapezius, levator scapulae, and rhomboid muscles.
Depression is achieved by gravity and the actions of the latissimus dorsi, serratus anterior,
pectoralis large and small, and trapezius muscles. Further rotation is accomplished by the
trapezius and serratus anterior tissues.

The downward rotation is accomplished by gravity as
well as the latissimus dorsi, levator scapulae, rhomboids, and the large and small muscles of
the pectoralis. With these six steps, the scapula allows for the full functioning of the shoulder
joint, one of the most sensitive and diverse joints in the human body.

One example of the importance of the numerical movement of a complete range of complete movement is that of
the wing girdle.


Scapula muscle


The internal muscles of the scapula attach directly to the bone surface. These muscles serve
to stabilize the four members of the rotator cuff and the glenohumeral joint. Contains:


supraspinatus


Function: Hand abduction initiative (first 15 degrees), stabilize the glenohumeral joint
Source: Supraspinas fossa
Insertion: Above the maximum tubercle
Protection: Suprascapular nerve (C5, C6)


Infraspinatus


Function: Lateral rotation of the arm, stabilizing the glenohumeral joint
Source: Infraspinous fossa
Insertion: The greater tubercle of the humerus between the supraspinatus and the terrace
minor insertion
Protection: suprascapular nerve (C5, C6)


Terrace Minor


Function: Lateral rotation of the arm, stabilizing the glenohumeral joint
Source: lateral/axial border and adjacent posterior aspect of the scapula
Insertion: Degenerative aspect of tuberculous over-humorous.
Protection: axonal nerve (C5, C6)


Subscapularis


Functions: Hand operation and mid-rotation stabilize the glenohumeral joint.
Source: Subscriber Fosa
Insertion: Small tubercles of the humerus
Reservation: accessory nerves (C5, C6, C7)

The peripheral muscles of the scapula are associated with processes of the scapula and
affect movement at the glenohumeral joint: These include:


biceps brachii


Function: Dislocation of the shoulder, major flexion of the forearm, the inclination of the
forearm
Original:
Small head: choroid process
Long head: Supergralanoid tubercle
Insertion: Radial tuberculosis and adipose tissue attached to the forearm (as dividing
aponeurosis)
Care: Neuralgia (C5, C6)


Trip Brachi


Functions: Dislocation of the shoulder, preventing the major extension of the cell
Original:
Lateral head: above the radial groove,
Medium head: below the radial groove
Long head: Infraglonoid tubercle of the scapula.
Involvement: Mucosal ulcer and adhesion tissue process
Protection: radial nerve (C6, C7, C8)


Triangular


Function:
The anterior factor is responsible for the flexion and rotation of the arm.
The central element is responsible for hand abduction (up to 90 degrees).
The posterior aspect is responsible for arm extension and lateral rotation.
Source: Lateral clavicle, acromion and scapular spine
Insertion: Deltoid tuberosity
Protection: axonal nerve (C5, C6)


Fixed muscles of the scapula:

Trapezius muscle


Function:
Lift the upper fibers scapula and rotate it during arm abduction (90 to 180 degrees).
The middle fibers repel the scapula.
The lower fibers pull the scapula crumbling.
Source: Spinal processes of the skull, ductal ligament, and C7 to T12
Insertion: clavicle, acromion and scapular spine
Shielding: secondary nerve (cranial nerve XI)


Levator scapula


Function: Lifts the scapula
Source: Inverse processes from C1 to C4 vertebrae
Insertion: Boundary between the scapula
Reservation: C3, C4, and dorsal scapular nerve (C5)


Anterior to Stratus


Function: Fixes the scapula in the thoracic wall and facilitates arm rotation and abduction (90
to 180 degrees)
Source: Upper eight rib surface towards the chest
Insertion: alone the entire anterior length of the medial border of the scapula
Protection: Long thoracic nerve (C5, C6, C7)


Rhomboid Major


Function: Withdraw the scapula and rotate
Source: Spinal processes of the T2 to T5 vertebrae
Insertion: Infertile border of the scapula
Protection: Dorsal scapular nerve (C5)


Rhinobid Minor

Function: Withdraw the scapula and rotate
Source: Spine processes of the vertebrae from C7 to T1
Insertion: Boundary between the scapula
Protection: Dorsal scapular nerve (C5)


Other muscles associated with the scapula:


Latismus Dorsey


Functions: Extension, rotates the joint and middle-upper limb
Source: Spinal processes from T6 to T12, iliac crest, thoracolumbar fascia, inferior three ribs
and the inferior angle of the scapula
Insertion: Interbuterial sulcus of humerus
Defense: Thoracodorus nerve (C6, C7, C8)


Teres major


Function: Rotation between arm operation and
Source: The posterior surface of the scapula at its inferior angle
Insertion: Intrauterine groove on the subject between it
Care: Lower scapular nerve (C5, C6)


Pectoralis Minor


Function: numbness of the shoulder, the eruption of the scapula
Source: Third, fourth, and fifth ribs close to their expensive cartilage
Insertion: Coracoid process
Reservation: medial pectoral nerve (C8, T1)


Coracobrachialis


Functions: Join the flap and arm
Source: Chorcoid process
Insertion: Medium humorous, on the subject in between
Protection: Musculocutaneous nerve (C5, C6, C7)


Omohide


Function: Pulls down bones, is active when speaking and swallowing
Source: Superior border of the scapula
Insertion: Defective edge of hypoid
Reservation: Ensa Uterus (C1, C2, C3)

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