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Questions and Answers
What is the acromiotrapezius?
What is the acromiotrapezius?
What muscle is located posterior to the acromiotrapezius?
What muscle is located posterior to the acromiotrapezius?
Spinotrapezius
What is the clavotrapezius?
What is the clavotrapezius?
A large muscle extending from the neck to the shoulder
What is the primary function of the clavobrachialis?
What is the primary function of the clavobrachialis?
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Where does the levator scapulae ventralis extend from?
Where does the levator scapulae ventralis extend from?
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What is the location of the acromiodeltoid?
What is the location of the acromiodeltoid?
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What type of muscle is the latissimus dorsi?
What type of muscle is the latissimus dorsi?
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What is the rhomboideus?
What is the rhomboideus?
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What does the splenius muscle cover?
What does the splenius muscle cover?
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Where is the serratus dorsalis superior located?
Where is the serratus dorsalis superior located?
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What is the function of the external oblique?
What is the function of the external oblique?
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What is the origin of the biceps brachii?
What is the origin of the biceps brachii?
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What characterizes the triceps brachii?
What characterizes the triceps brachii?
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What is the role of the masseter muscle?
What is the role of the masseter muscle?
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What envelops the dorsal group muscles at the wrist?
What envelops the dorsal group muscles at the wrist?
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What is the primary characteristic of the sternomastoid?
What is the primary characteristic of the sternomastoid?
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What does the rectus abdominis muscle extend from?
What does the rectus abdominis muscle extend from?
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Study Notes
Cat Muscles Overview
- Acromiotrapezius: Thin flat muscle from the middle back to shoulder; central trapezius muscle.
- Spinotrapezius: Located posterior to the acromiotrapezius, partially covered by it.
- Clavotrapezius: Large muscle extending from neck to shoulder, anterior to acromiotrapezius.
- Clavobrachialis: Triangular muscle, continuation of the clavotrapezius onto the shoulder.
Muscles of the Shoulder and Back
- Levator scapulae ventralis: Slender muscle from atlas to scapula, beneath clavotrapezius.
- Acromiodeltoid: Short thick muscle between levator scapulae ventralis and clavobrachialis.
- Spinodeltoid: Short muscle, ventral to acromiotrapezius, posterior to levator scapulae ventralis and acromiodeltoid.
- Latissimus dorsi: Large triangular muscle from middle back to humerus.
- Rhomboideus: Muscle under medial portions of acromiotrapezius and spinotrapezius, from scapula border to mid-dorsal line.
- Rhomboideus capitis: Narrow muscle from skull back to scapula, also known as the occipitoscapularis.
Muscles of Neck and Shoulder
- Splenius: Broad muscle beneath clavotrapezius, covers dorsal neck.
- Supraspinatus: Occupies supraspinous fossa of scapula, under acromiotrapezius.
- Infraspinatus: Fills infraspinous fossa, located beneath supraspinatus.
- Teres major: Thick muscle posterior to infraspinatus, extends to humerus.
- Teres minor: Small muscle, visible when infraspinatus and teres major are separated.
Muscles of the Abdominal Wall
- Subscapularis: Occupies subscapular fossa.
- Serratus dorsalis superior: Thin muscle sheet over dorsal thorax and neck.
- Serratus dorsalis inferior: Thin muscle over lumbar region, caudal to serratus dorsalis superior.
- Spinalis dorsi: Most medial deep back muscle, located in mid dorsal thoracic line.
- Longissimus dorsi: Thick muscle mass lateral to spinalis dorsi, fills gap between vertebrae processes.
Pectoral Muscles
- Pectoantebrachialis: Most anterior pectoral muscle, extends from chest midline to forelimb.
- Pectoralis Major: Two-part muscle from sternum to humerus; cranial part overlaps pectoantebrachialis.
- Pectoralis minor: Small, fan-shaped muscle, partially overlapped by pectoralis major.
- Xiphihumeralis: Long, thin muscle, most posterior of the pectoral group.
Additional Muscles
- Serratus ventralis: Fan-shaped muscle extending from ribs to scapula, obliquely upward.
- Levator scapulae: Continuation of serratus ventralis, indistinct separation of borders.
- Transverse coastrum: Short thin muscle covering cranial rectus abdominis.
- External Oblique: Broad flat muscle covering abdomen and thorax; fibers run anterodorsally.
- Internal Oblique: Smaller muscle beneath external oblique; fibers run at right angles.
- Transverse abdominis: Very thin muscle layer of abdominal wall, fibers run transversely.
- Rectus abdominis: Strap-like muscle from sternum to pubis alongside linea alba.
Facial and Jaw Muscles
- Linea alba: Mid-ventral line where aponeuroses of muscles meet.
- Masseter: Large muscle mass at jaw angle, located behind and below eyes.
- Sternohyoid: Ribbon-like muscle across digastric surface, parallel to mylohyoid margin.
- Mylohyoid: Thin muscle closing gap formed by mandible; appears after reflecting digastric.
- Digastric: Thick prismatic muscle lying medial to mandible; connects mandible with skull.
- Sternomastoid: Wide flat muscle from sternum to skull side, forms V-shaped collar with counterpart.
- Geniohyoid: Strap-like muscle deep to mylohyoid along mid-ventral line.
Arm Muscles
- Biceps brachii: Spindle-shaped muscle along humerus's ventral surface.
- Triceps brachii: Largest upper arm muscle with three heads: long, lateral, and medial.
- Brachialis: Small muscle on outer arm surface, anterior to lateral triceps head.
- Dorsal carpal ligament: Holds tendons of dorsal muscle group in place at wrist.
- Brachioradialis: Narrow band extending from upper arm lateral side.
- Extensor carpi radialis longus: Spindle-shaped muscle underlying brachioradialis, medial arm extension.
- Extensor carpi ulnaris: Prismatically shaped muscle with a tendon inserting on fifth digit.
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Test your knowledge of cat muscles with these flashcards. Each card features a specific muscle along with its definition, helping you understand their locations and functions. Perfect for students in anatomy or veterinary science.
