The clavodeltoid originates from the clavicle and inserts on the ulna. This muscle flexes the forearm.
What is the function of the collateral ligaments? lateral collateral ligament function.


Do humans have Spinotrapezius?

clavotrapezius, acromiotrapezius, spinotrapezius – three muscles in cat, one muscle in human (trapezius).

What is the origin of the Acromiotrapezius?

Acromiotrapezius is the middle trapezius muscle. It covers the dorsal and lateral surfaces of the scapula. Its origin is the neural spines of the cervical vertebrae and its insertion is in the metacromion process and fascia of the clavotrapezius.

What is the insertion of the Spinodeltoid?

Muscle Name Origin Insertion
Spinodeltoid Spine of Scapula Humerus
Spinotrapezius Spines of thoracic vertebra Scapula
Sternomastoid Sternum Mastoid process
Supraspinatus (Deep) Scapula Humerus
Do cats have triceps?

Cat Muscles 11. The triceps brachii consists of three heads and is the largest muscle of the brachium. This muscle (located posterior to the humerus) functions to extend the forearm.

What is the function of the Spinotrapezius?

The spinotrapezius arises from the spinous processes of thoracic vertebrae and inserts on the fascia covering the scapular muscles. Its action is to adduct the scapula and pull it posteriorly.

What is the action of Spinotrapezius?

action: retracts (adducts), depresses and. rotates scapula. This is one of the five muscles that are grouped as muscles of the scapula, or sometimes as muscles that moor the scapula.

What movement does the levator scapulae perform?

The levator scapulae functions to elevate the scapula and tilt the glenoid cavity inferiorly by rotating the scapula downward. If the scapula is fixed, a contraction of the levator scapulae leads to the lateral flexion of the cervical vertebral column to the side and stabilizes the vertebral column during rotation.

What is the action of Pectoantebrachialis?

The major action of these muscles is adduction of the forelimb (i.e. the front leg is drawn toward the midline). There are four subdivisions of the pectoral group in the cat. The pectoantebrachialis is the most superficial muscle of the pectoral group.

What is the function of the latissimus dorsi?

Latissimus dorsi works collaboratively with the teres major and pectoralis major to perform actions of the upper extremity. Together, these muscles will work to adduct, medially rotate and extend the arm at the glenohumeral joint.

What is the origin insertion and action of the latissimus dorsi?

Latissimus dorsi
Origin Spinous processes of vertebrae T7-L5, thoracolumbar fascia, iliac crest, inferior 3 or 4 ribs and inferior angle of scapula
Insertion Floor of intertubercular groove of the humerus
Artery Thoracodorsal branch of the subscapular artery
Nerve Thoracodorsal nerve (C6, C7, C8)
Does Infraspinatus abduct?

Infraspinatus is the main external rotator of the shoulder joint. It assists in producing shoulder extension. With the arm fixed, it abducts the inferior angle of the scapula.

Where is the infraspinatus muscle?

Your infraspinatus muscle is a thick triangular muscle located at the back of your shoulder. It’s attached to the top of your upper arm bone (humerus) and your shoulder blade (scapula). The other rotator cuff muscles are the supraspinatus, subscapularis, and the teres minor.

What is the infraspinatus muscle?

The infraspinatus is a thick triangular muscle that occupies much of the infraspinous fossa of the scapula. It is a member of the rotator cuff, commonly remembered by the mnemonic “SITS” (supraspinatus, infraspinatus, teres minor, subscapularis).

Where does Brachioradialis attach?

Origin Lateral supracondylar ridge of humerus, lateral intermuscular septum of arm
Insertion (Proximal to) styloid process of radius
Action Elbow joint: Forearm flexion (when semi pronated)
Innervation Radial nerve (C5-C6)
Blood supply Radial artery, radial recurrent arteries, radial collateral artery
Where is the temporalis on a cat?

Temporalis. The temporalis is a great mass of mandibular muscle, and is also covered by a tough and shiny fascia. It lies dorsal to the zygomatic arch and fills the temporal fossa of the skull. It arises from the side of the skull and inserts into the coronoid process of the mandible.

Where is Spinotrapezius located?

Anatomical note – The spinotrapezius muscle lies dorsally and extends from T4 to L3 along either side of the spine. The anterior border extends laterally to approximately the shoulder blade.

What is the tricep Brachii?

The triceps brachii is a large, thick muscle on the dorsal part of the upper arm. It often appears as the shape of a horseshoe on the posterior aspect of the arm. The main function of the triceps is the extension of the elbow joint.

What is the area between your neck and shoulder called?

TrapeziusTA98A04.3.01.001TA22226FMA9626Anatomical terms of muscle

What is Subscap?

The subscapularis is a muscle in your shoulder that helps you internally rotate your arm. … The subscapularis connects from your shoulder blade to your humerus, or upper arm bone. All the muscles of the rotator cuff, including the subscapularis, can tear from overuse, trauma, or age-related conditions.

Do humans have Xiphihumeralis?

Pectoantebrachialis & xiphihumeralis are chest muscles in the cat. These muscles are missing in the human. Clavodeltoid, acromiodeltoid, & spinodeltoid in the cat. There is one deltoid in the human.

Where is the rhomboid major?

Rhomboid major is a broad quadrilateral muscle that originates from the spinous processes of the second to second to fifth thoracic vertebrae (T2-T5). The muscle extends obliquely in an inferolateral direction to insert into the medial border of scapula, between the inferior angle and root of the spine of scapula.

What action is caused by the levator scapula muscle?

Action: The primary actions of levator scapulae muscle are elevation, adduction of the scapula and tilting the glenoid cavity inferiorly by rotating the scapula downwardly.

What type of muscle is the levator scapulae?

The levator scapulae is a skeletal muscle situated at the back and side of the neck. As the Latin name suggests, its main function is to lift the scapula.

What is the antagonist of the levator scapulae?

Levator Scapulae Antagonist For the Levator Scapulae, the antagonist’s muscles are, Latissimus Dorsi. Pectoralis Major.

What is the origin of the Pectoantebrachialis?

Origin: arrises in two heads from medial epicondyle of humerus, other from olecranon. Insertion: middle of ulna they join and insert on ulnar side of carpals. Function: flexor of wrist.

Do humans have an Epitrochlearis?

The anconeus epitrochlearis muscle (AEM) is present in several animal species, such as reptiles, amphibians, and mainly mammals; in humans, it is considered an anomalous or accessory muscle.

What muscles extend the forearm?

The triceps brachii extend the forearm.

Where is the latissimus dorsi?

The latissimus dorsi muscle spans over the lumbar and lower thoracic regions of the back. Depending on the origin, one can distinguish four parts of this muscle: Vertebral part: originating from the spinous processes of the 7th to 12th thoracic vertebrae and the thoracolumbar fascia.

What is the action of the latissimus dorsi muscle quizlet?

Palpation: Latissimus dorsi and theres major both compromise the posterior portion of the axilla and can be palpated together at the posterior axillary fold. Action: Lateral Rotation, aDDuction and Extension of the arm.

Is the latissimus dorsi a retractor or protractor?

The latissimus dorsi is a type of retractor muscle. It is considered the most significant muscle of the human body and the largest muscle of the human upper body.

What dorsi means?

History and Etymology for latissimus dorsi New Latin, literally, broadest (muscle) of the back.

Does the infraspinatus adduct?

Function. The infraspinatus is the main external rotator of the shoulder. When the arm is fixed, it adducts the inferior angle of the scapula. … Additionally, the infraspinatus reinforces the capsule of the shoulder joint.

How do you tear your infraspinatus?

Infraspinatus tear It’s usually caused by repetitive stress or normal aging. A complete, or full-thickness, tear severs the infraspinatus from the bone. It’s usually caused by an acute injury, such as falling.

What is the antagonist to infraspinatus?

The infraspinatus: agonistic: anterior deltoid, latissimus dorsi, lower trapezius, pectoralis major, pectoralis minor, serratus anterior, teres minor. antagonistic: middle deltoid, middle trapezius, posterior deltoid.

What do the supraspinatus and infraspinatus do?

The supraspinatus muscle abducts the upper arm (test with the arm at the side to avoid overlap with deltoid muscle function). The infraspinatus muscle externally rotates the upper arm at the shoulder.

What does supraspinatus and infraspinatus mean?

Muscle, infraspinatus: A muscle that assists the lifting of the arm while turning the arm outward (external rotation). … The supraspinatus muscle, which is responsible for elevating the arm and moving it away from the body; and. The subscapularis muscle, which moves the arm by turning it inward (internal rotation).

What is the insertion of the infraspinatus?

The infraspinatus originates from the infraspinous fossa of the scapula (shoulder blade). … From this location, the infraspinatus muscle travels upward diagonally and inserts onto the greater tubercle of the humerus (long bone of the upper arm).

What is infraspinatus fossa?

The infraspinatous fossa (infraspinatus fossa, infraspinous fossa) of the scapula is much larger than the supraspinatous fossa; toward its vertebral margin a shallow concavity is seen at its upper part; its center presents a prominent convexity, while near the axillary border is a deep groove which runs from the upper …

Is the infraspinatus flexor or extensor?

Insertion: Distal to the greater tubercle of the humerus. Action: Outward rotator and abductor of the humerus and a flexor or extensor of the shoulder joint, depending on the position of the joint when the muscle contracts. Nerve: Suprascapularis.