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The sternal head originates from the manubrium sterni, while the clavicular head from the medial third of the clavicle. The insertion is the lateral surface of the mastoid process of the temporal bone and the lateral half of the superior nuchal line of the occipital bone.Sternocleidomastoid Attachments
It originates on the anterior surface of the manubrium, and the superior border and anterior surface of the medial third of the clavicle. The SCM converges into one point and inserts on the lateral surface of the mastoid process and the nuchal line of the occipital bone.Function. Rotation of the head to the opposite side or obliquely rotate the head. It also flexes the neck. When acting together it flexes the neck and extends the head.
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What is the origin and insertion of Sternocleidomastoid?
Sternocleidomastoid Attachments
It originates on the anterior surface of the manubrium, and the superior border and anterior surface of the medial third of the clavicle. The SCM converges into one point and inserts on the lateral surface of the mastoid process and the nuchal line of the occipital bone.
What is the action of Sternocleidomastoid?
Function. Rotation of the head to the opposite side or obliquely rotate the head. It also flexes the neck. When acting together it flexes the neck and extends the head.
Sternocleidomastoid (SCM) | Structure, Origin, Insertion, More
Images related to the topicSternocleidomastoid (SCM) | Structure, Origin, Insertion, More
What is the insertion of the sternocleidomastoid quizlet?
Where does the sternocleidomastoid muscle originate and insert? ORIGINATES from the external surface of the occipital bone and posterior midline of the cervical and thoracic regions. INSERTS on the lateral third of the clavicle and parts of the scapula.
What is the function of the sternocleidomastoid muscle quizlet?
The sternocleidomastoid muscle is a two-headed neck muscle, which true to its name bears attachments to the manubrium of sternum (sterno-), the clavicle (-cleido-), and the mastoid process of the temporal bone (-mastoid). Flexes neck ; rotates head.
What is the origin insertion and action of the trapezius?
The trapezius has multiple origin and insertion points—it’s simply too big not to. It originates on the occipital bone, the ligamentum nuchae, and the spinous processes of T01–T12. The trapezius inserts on the lateral third of the clavicle, as well as the acromion and scapular spine of the scapula.
What is the origin and insertion of the levator scapulae?
Origin and insertion
Levator scapulae originates from the transverse processes of the first four cervical vertebrae. The muscle fibers descend laterally to insert at the superior angle and medial border of scapula, between the superior angle and base of the spine of scapula.
What happens when the sternocleidomastoid muscles contract?
Sternocleidomastoid Function
When just one SCM muscle contracts: It tilts your head to the ipsilateral (same) side to which the muscle is located. For example, the SCM on the right side of your neck tilts your head to your right. One SCM can also turn, or rotate, your head to the opposite side.
See some more details on the topic What is the origin insertion and action of the sternocleidomastoid? here:
Sternocleidomastoid
ORIGIN Anterior and superior manubrium and superior medial third of clavicle ; INSERTION Lateral aspect of mastoid process and anterior half of superior nuchal …
Sternocleidomastoid – Physiopedia
Origin[edit | edit source] … It arises by two heads: … They arise from the anterolateral surface of the manubrium sterni and the medial third of the superior …
Learn Muscle Anatomy: Sternocleidomastoid – Visible Body
It originates on the anterior surface of the manubrium, and the superior border and anterior surface of the medial third of the clavicle. The …
Sternomastoid muscle (cat only)
sternocleidomastoid) origin: … action: bilateral contraction depresses snout, … The above drawings of the origin and insertion might help visualize this …
What is the origin of the pectoralis major?
| Origin | Clavicular part: anterior surface of medial half of clavicle Sternocostal part: anterior surface of sternum, Costal cartilages of ribs 1-6 Abdominal part: Anterior layer of rectus sheath |
|---|---|
| Blood supply | Pectoral branches of thoracoacromial artery, perforating branches of internal thoracic artery |
Which of the following is an action of the sternocleidomastoid quizlet?
unilaterally – it draws the head toward the shoulder and rotates it pointing the chin superiorly and to the opposite side.
Which of the following muscles is named for its origin and insertion?
Location of origin or insertion: The sternocleidomastoid names the sternum (“sterno”) and clavicle (“cleido”) as its origins and the mastoid process of the temporal bone as its insertion.
Sternocleidomastoid Muscle: Function Anatomy – Human Body | Kenhub
Images related to the topicSternocleidomastoid Muscle: Function Anatomy – Human Body | Kenhub
What is the difference between the insertion and origin of a muscle?
A skeletal muscle attaches to bone (or sometimes other muscles or tissues) at two or more places. If the place is a bone that remains immobile for an action, the attachment is called an origin. If the place is on the bone that moves during the action, the attachment is called an insertion.
What is the insertion of the pectoralis major quizlet?
Origin: Juncition of rib 1 and its costal cartilage, insert inferior surface of middle third of clavicle, innervation: Nerve to subclavius (C5-C6), FX: Anchors and depresses clavicle.
What is the origin of the deltoid quizlet?
The origin of the deltoid muscle includes the anterior lateral third of the clavicle and the lateral portion of the acromion process. The insertion of the deltoid muscle is the humeral tuberosity on the lateral humerus.
What is the origin of the rectus abdominis quizlet?
A paired muscle running each side of the abdomen and separated by connective tissue called the linea alba (white line). It is attached at the costal cartilages and xyphoid process of the ribs and the pubic symphysis of the pelvis. It controls the tilt of the pelvis and the curvature of the lower spine.
What is the origin and insertion of the deltoid?
The deltoid is a thick, triangular shoulder muscle. It gets its name because of its similar shape to the Greek letter ‘delta’ (Δ). The muscle has a wide origin spanning the clavicle, acromion and spine of scapula. It passes inferiorly surrounding the glenohumeral joint on all sides and inserts onto the humerus.
What is the origin and insertion of the pectoralis minor?
Origin: (proximal attachments): Anterior surfaces of the sternal ends of ribs 3-5. Insertion: (distal attachments): Coracoid process of scapula.
What is the origin and insertion of the biceps brachii muscle?
The biceps brachii muscle is one of the chief muscles of the arm. The origin at the scapula and the insertion into the radius of the biceps brachii means it can act on both the shoulder joint and the elbow joint, which is why this muscle participates in a few movements of the arm.
What is the origin of the Subclavius?
The subclavius muscle originates by a strong tendon from the sternal end of the 1st rib, near its articulation with the costal cartilage. The tendon spreads superolaterally into a muscle belly that inserts into the lower surface of the middle third of the body of clavicle (groove for subclavius muscle).
Sternocleidomastoid Muscle – Origin, Insertion, Action
Images related to the topicSternocleidomastoid Muscle – Origin, Insertion, Action
What is the origin and insertion of the latissimus dorsi?
Origin of the latissimus dorsi is from spinous processes of thoracic T7–T12, thoracolumbar fascia, iliac crest and inferior 3 or 4 ribs, inferior angle of scapula and insertion on floor of intertubercular groove of the humerus.
What is the origin insertion and action of the serratus anterior?
The serratus anterior is a muscle that originates on the surface of the 1st to 8th ribs at the side of the chest and inserts along the entire anterior length of the medial border of the scapula. The serratus anterior acts to pull the scapula forward around the thorax.
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