lab demo 1 Flashcards
attachments of the subscapularis & function
medial to the scapula
spans the shoulder joint
attaches to the lesser tubercle
function: medial & lateral stability
what does the subscapular nerve innervate?
subscapularis
attachments of the supraspinatus & function
spans the supraspinous fossa of the scapula to the greater tubercle of the humerus
extends shoulder joint
attachments of the infraspinatus & function
spans from the infraspinous fossa down to the greater tubercle
medial & lateral joint stability
what does the suprascapular nerve innervate?
supraspinatus & infraspinatus
attachments of the teres major & function
spans from the dorsocaudal border of the scapula down to the proximomedial aspect of the humerus
shoulder flexion
attachments of the deltoideus & function
spans from scapular spine, down across the shoulder joint to the deltoid tuberosity
shoulder flexion
what does the axillary n. innervate?
teres major & deltoideus
attachments of biceps brachii & function
starts at the distal aspect of the scapula by the supraglenoid tubercle at attaches distally to the proximomedial aspect of the radius & ulna
elbow flexion
attachments of the brachialis & function
starts at the caudal humerus & connects at the proximomedial aspect of the radius & ulna
elbow flexion
what does the musculocutaneous nerve innervate?
biceps brachii & brachialis
attachments of the triceps & function
originate from distocaudal border of the scapula & the proximal aspect of the humerus
travel down the caudal aspect of the brachium
insert at the olecranon tuber
elbow joint extension
attachments of the antebrachial extensors & function
originate at the lateral epicondyle of the humerus
span across the dorsal aspect of carpal, metacarpophalangeal, & interphalangeal joints
carpal, metacarpophalangeal, interphalangeal joint extension
what does the radial nerve innervate?
triceps & antebrachial extensors
attachments of the antebrachial flexors & function
originate at the medial epicondyle
come across the palmar aspect of the carpal, metacarpophalangeal, & interphalangeal joints
carpal, metacarpophalangeal, & interphalangeal joint flexion
what does the median & ulnar nerve innervate?
antebrachial flexors
attachments of the serratus ventralis & function
originates at the dorsomedial aspect of the scapula
attaches to the transverse processes of the caudal cervical vertebrae & ribs 1-7
support the trunk between the thoracic limbs
what does the long thoracic nerve innervate?
serratus ventralis
attachments of the rhomboideus & function
originates at the dorsal border of the scapula
to the head, median raphe of neck, and spinous processes of cranial thoracic vertebrae
keeps dorsal aspect of the scapula against body
what do the dorsal branches of cervical and thoracic spinal nerves innervate?
rhomboideus
attachments of the trapezius & function
originates from scapular spine
attaches to the median raphe of the neck & supraspinous ligament from cranial thoracic vertebrae
keeps dorsal aspect of the scapula against body
attachments of omotransversarius & function
spans the distal scapular spine to the wing of the atlas
limb protraction (pulling the limb cranially)
attachments of the brachiocephalicus & function
spans from the head, medain raphe over cranial neck to the craniodistal humerus
limb protraction (pulling limb cranially)
what does the accessory nerve innervate?
trapezius
omotransversarius
brachiocephalicus (cranial part)
what does the braciocephalic nerve innervate?
distal part of the brachiocephalicus
attachments of deep pectoral & function
length of the sternum to the proximocranial humerus
limb retraction (pulling limb caudally)
attachments of the superficial pectorals & function
cranial sternebrae to proximocranial humerus
limb protraction (pulling limb cranially)
what does the pectoral nerves innervate?
deep pectoral & superficial pectorals
attachments of latissimus dorsi & function
spinous processes of thoracic & lumbar vertebrae
spans ribs 11-13
to proximomedial humeral shaft
limb retratction (pulling limb caudally)
what does the thoracodorsal nerve innervate?
latissimus dorsi
