Practical 2 - cat muscles Flashcards
Sternohyoid
Covers windpipe (runs from sternum to hyoid) near the origin it will separated from the sternomastoid muscle
Sternothyroid
(Dorsal to sternohyoid)
O: Manubrium of sternum
I: Thyroid cartilage
A: Depress the larynx
Thyrohyoid
O: Thyroid cartilage
I: Hyoid Bone
A: Depresses hyoid bone
Digastrics
Right under jaw
O: Mastoid process + Mandible
I: Hyoid Bone
A: Elevates hyoid bone
Mylohyoid
Runs between + deep to digastrics
Geniohyoid
Muscle under mylohyoid that runs from lower jaw to hyoid
Masseter
Large, lies below zygomatic arch behind/below eyes
O: Zygomatic arch
I: Lateral surface of ramus + angle of mandible
A: Elevates mandible
Temporalis
Above zygomatic arch posterior to the eye
O: Temporal fossa
I: Mandibular coronoid process
A: Elevation/Retraction of the mandible
Latissimus dorsi
O: Spinous process of thoracic vertebrae, iliac crest, ribs 9-12
I: Intertubercular groove of humerus + between two majors
A: Arm abduction and extension
External oblique
O: Ribs 5-12
I: iliac crest
A: Unilateral/Bilateral contraction + trunk flexion
Internal oblique
O: Iliac crest
I: Ribs 10-12, pubic crest
A: Bilateral/unilateral contraction trunk flexion
Transversus abdominus
Under internal oblique
O: Iliac crest, costal cartilage
I: Pubic crest
A: Trunk rotation, bilateral contraction
Rectus abdominis
O: pubic crest/symphysis
I: costal cartilage + xiphoid process
A: Trunk flexion
Multifidus spinae
O: Vertebrae C4-C7
I: Spinous process of vertebrae 2-5 above origin
A: Extension and lateral flexion of spine
Erector spinae
(Lateral to multifidus) appears as 2 muscles
O: Vertebrae
I: Mastoid process
A: Extends spine, lateral flexion
