Muscle review: mastication, cervical region, shoulder girdle Flashcards
Insertion, function, innervation
Temporalis muscle: origin/insertion
Temporal fossa of the parietal bone to the coronoid process of mandible
Temporalis: function
Close jaws
Temporalis: innervation
Mandibular nerve (V3) (Mandibular branch of Trigeminal)
Masseter: origin/insertion
Zygomatic arch to the masseter fossa of the mandible
Masseter: function
Close jaws
Masseter: innervation
Mandibular nerve (V3) (Mandibular branch of Trigeminal)
Digastricus: origin/insertion
Paracondylar process to the caudal aspect of angular process
Digastricus: function
Open mouth
Digastricus: innervation
Mandibular nerve (V3) (Mandibular branch of Trigeminal)
Splenius: origin/insertion
Median Raphe T1/2 to C1 and fascia of occipital ridge
Splenius: function
Raise head
Splenius: innervation
Segmental spinal nerves
Scalenus: origin/insertion
Scalloped muscles from ventral surfaces of cervical vertebrae to ribs of T6-9
Scalenus: function
Ventrolateral flexion/inspiration
Scalenus: innervation
Segmental spinal nerves
Sterno-thyro-hyoideus: origin/insertion
Manubrium to cranial hyoids and tongue
Sterno-thyro-hyoideus: function
Retract hyoids/ventral flexion of neck
Sterno-thyro-hyoideus: innervation
Segmental spinal nerves
Sternocephalicus: origin/insertion
Manubrium to skull and angular process
Sternocephalicus: function
Ventral/ventrolateral flexion of neck
Sternocephalicus: innervation
Accessory nerve (11)
Omotransversarius: origin/insertion
Transverse process of C1 to acromion
Omotransversarius: function
Bring shoulder blade forward/lateral neck flexion
Omotransversarius: innervation
Accessory nerve (11)
Brachiocephalicus: origin/insertion
Median raphe of occiput/atlas to distal medial humerus
Brachiocephalicus: function
Advance limb/extend shoulder joint/lateral neck flexion
Brachiocephalicus: innervation
Accessory nerve (11)
Trapezius: origin/insertion
C3-T9 median raphe to lateral spine of scapula and acromion
Trapezius: function
Elevate and abduct forelimb/elevate scapula dorsal and medial
Trapezius: innervation
Accessory nerve (11)
Rhomboideus: origin/insertion
C5-T8 median raphe to medial aspect of scapula
Rhomboideus: function
Dorsal medial elevation of scapula
Rhomboideus: innervation
Segmental spinal nerves
Serratus ventralis: origin/insertion
Transverse processes of C3 caudal and 9-10 ribs to dorsomedial aspect of scapula (deep to subscapularis)
Serratus ventralis: function
Support trunk “sling”
Serratus ventralis: innervation
Long thoracic nerve
Superficial pectorals (cranial): origin/insertion
Cranial sternum to lateral proximal humerus
Superficial pectorals (cranial): function
Adduct limb/prevent abduction
Superficial pectorals (cranial): innervation
Cranial pectoral nerve
Deep pectorals (caudal): origin/insertion
Caudal sternum to lateral proximal humerus
Deep pectorals (caudal): function
Flexes shoulder joint/draws trunk forward/draws limb caudal
Deep pectorals (caudal): innervation
Caudal pectoral nerve
Latissiumus dorsi: origin/insertion
T5-L4 median raphe to proximal medial humerus
Latissiumus dorsi: function
Flex shoulder joint
Latissiumus dorsi: innervation
Thoracodorsal nerve
Cutaneous trunci**: origin/insertion
Under the skin
Cutaneous trunci**: function
Skin twitching/sensory
Cutaneous trunci**: innervation
Lateral thoracic nerve