Unit 1 Flashcards
where is the fovea dentis located
on the dorsal surface of the ventral arch
what passes through the transverse foramina of cervical vertebra
vertebral vessels and nerves
what passes through the alar foramen of cervical vertebra
vertebral artery and ventral branch of the first cervical spinal nerve
what passes through the lateral vertebral foramen of C1
vertebral artery and the first cervical spinal nerve
what passes through the lateral vertebral foramen of C2
the second cervical nerve
cranial articular processes are directed
dorsomedially
caudal articular processes are directed
ventrolaterally
transverse foramina are in what cervical vertebra in the horse
C1-C6
Transverse foramina are in what cervical vertebra in the ruminant
C2-C6
what can be used as a landmark for radiographs using C6
ventral tubercle (lamina) of the transverse processes of c6 are more extensive
what vertebra has a caudal costal fovea
C7
C7 transverse process
undivided and usually does not have a transverse foramen
what is a dewlap
penulous skin fold located alon gthe ventral apsect of the neck
what are wattles
elongated skin appendages located in the throat region
the dewlap and wattles are likely involved in what
thermoregulation
wattles are most commonly found in
goats
what are the attachments of the cutaneous colli (only prominent in horse)
manubrium; superficial cervical fascia to ventral midline
what is the function of cutaneous colli
tightens and moves the skin on the ventral surface of the neck
what are the actions of the brachiocephalicus
- when the head and neck are fixed, drawing the limb cranially and thus extending the shoulder joint.
- when right and left muscles act separately, bending the head and neck to the side
what is the function of cleidooccipitalis in the ruminant
advances the limb cranially and raises the head
what are the attachments of the cleidooccipitalis
clavicular intersection; nuchal line of the skull and funicular nuchal ligament
cleidomastoideus attachments
mastoid process and clavicular intersection
what is the function of the cleidomastoideus in the ruminant
draws the limb cranially and draws the head ventrally or laterally
what is the function of the cleidobrachialis
draws the limb cranially
omotransversarius attachments in the horse
(adhered to cleidomastoideus); shoulder fascia (horse does not have acromion) and transverse processes of c1-c4
omotransversarius attachments in the ruminants
acromion of scapula and wing of atlas (also partially attaches to the transverse process of the axis)
what is the function of the omotransversarius
draws the limb cranially and bends the neck to the side
what is the function of the sternomandibularis in the horse
flexes the head and neck and bends the head and neck to the side
what is the function of the sternomastoideus in the ox and goat
fix and draw the head and neck ventraly
what separates the jugular vein from the carotid sheath in the ox and goat (cranial neck)
the sternomastoideus
what are the attachments of the sternomandibularis in the ox
rostral border of the masseter muscle, ventral border of the mandible, and depressor labii inferioris muscle
what are the attachments of the sternomandibularis in the goat
zygomatic arch and lateral surface of the masseter muscle
what is the function of the sternomandibularis
flexes the head and neck
what is the function of the sternomastoideus in the sheep
fix and draw the head and neck ventrally
what are the attachments of the omohyoideus m in the horse
subscapular fascia near the shoulder joint and inserts on the lingual process of the basihyoid bone
what are the attachments of the omohyoideus in ruminants
deep cervical fascia near 3rd or 4th cervical vertebra and basihyoid bone
what is the function of the omohyoideus
draws the hyoid apparatus caudally
what is the attachment of the sternohyoideus
basihyoid bone
what is the attachment of the sternothyroideus
thyroid cartilage of the larynx
what are the functions of the sternothyrohyoideus
draw the hyoid apparatus caudally
what is the function of the cervical part of the trapezius
draws the scapula craniodorsally and elevates the scapula
what are the attachments of the thoracic part of the trapezius
from supraspinous ligament in the thoracic region and inserts on the tuber spine of the scapula in the horse and the spine of the scapula in ruminants
what is the function of the thoracic part of the trapezius
draws the scapula caudodorsally and elevates the scapula
what is the course of the dorsal branch of the accessory nerve
caudally over splenius and serratus ventralis
what does the dorsal branch of the accessory nerve innervate
brachiocephalicus, omotransversarius, and trapezius
what does the ventral branch of the accessory nerve innervate
the sternocephalicus
what are the attachments of the serratus ventralis cervicis
transverse processes of the last 4-5 cervical vertebrae and inserts on the serrated face of the scapula
what are the attachments of the serratus ventralis thoracic
lateral surface of the first 8-9 ribs and serrated face of scapula
what is the main muscle that supports the turnk
the serratus ventralis thoracis
what is the function of the cervical part of the serratus ventralis
draws the dorsal scapular cartilage cranially and rotates the ventral angle of the scapula caudally. Thus, moving the limb in a caudal direction.
what is the function of the thoracic part of the serratus ventralis
draws the dorsal scapular cartilage caudally and rotates the ventral angle cranially. Thus, moving limb cranially
what are the attachments of the rhomboideus cervicis
funicular part of the nuchal ligament from C2 to T2 vertebrae and inserts on craniomedial surface of the scapular cartilage
what are the attachments of the rhomboideus thoracis
spinous processes of the thoracic vertebrae via the dorsoscapular ligament and inserts on the caudomedial surface of the scapular cartilage
what is the primary action of the rhomboideus
draw the scapula dorsally and cranially
where are the superficial cervical lymph nodes located in the horse?
deep to brachiocephalicus and omotransversarius; cranial to subclavius muscle
where are the superficial cervical lymph nodes located in the ruminant?
deep to brachiocephalicus and omotransversarius and cranial to supraspinatus
what are the attachments of the splenius in the horse
nuchal ligament and spinous processes of T3-T5; mastoid process and nuchal crest (capitis part)
what are the attachments of the splenius in the ruminant
nuchal ligament and spinous processes of T1-T3; mastoid process and dorsolateral region of the occipital bone (capitis); transverse processes of C2 and C3 (cervicis, ox); wing of atlas and transverse processes of C2-C5 (cervicis SR)
acting together, right and left splenius function to
elevate the head and neck
acting singly, the splenius acts to
bend the head and neck laterally
what are the attachments of the semispinalis capitis in the horse
articular processes of the cervical vertebrae, spinous processes of T3-T5 and transverse processes of T1-T7, occipital bone ventral to nuchal crest
what are the attachmets of the semispinalis capitis in the ruminant
transverse processes of T1-T10, articular processes of C3-C7, and nuchal ligament; occipital bone
what is the function of semispinalis capitis when they function together
the main extensor of the head and neck;
what is the function of semispinalis capitis when its acting singly
bends the head to the side
the nuchal ligament large animals is composed of what parts
funicular and laminar parts
in horses, the funicular part of the nuchal ligament courses
between the external occipital protuberance of the skull and T3, T4, or T5 vertebra.
in horses, the laminar part courses from
C2-C7 vertebrae to the funicular part
in ruminants the funicular part of the nuchal ligament courses between
external occipital protuberance of the skull and the first few thoracic vertebrae
in ruminants, the laminar part of the nuchal ligament courses between
C2-C7 and the funicular part
longissimus capitis attachments in the horse
from transverse processes of T1 and T2 vertebrae and mastoid process of the skull
longissimus capitis attachments in the ruminant
from C5 to T7 and mastoid process
what is teh function of the longissimus capitis and atlantis
extend the head and neck and bend the head and neck to the side
what are the attachments of the longus atlantis in the ruminant
transverse processes of C2-C6 vertebrae and inserts on the wing of the atlas
______ may exit thorugh the belly of longus atlantis in ruminants, causing the muscle to appear divided into 2 muscles
ventral branches of several cervical spinal nerves
attachments of longus capitis in the horse
transverse processes of C3-C5 vertebrae and inserts on the muscular tubercle on the base of the skull
attachments of the longus capitis in the ruminant
transverse processes of C2-C6 vertbebrae and inserts on the muscular tubercle on the base of the skll
longus capitis muscle function
flexes the head and neck and bends the head and neck laterally
the cervical portion of the longus colli attachments
transverse processes of C3-C7 vertebrae and inserts on the bodies of the cervical vertebrae and ventral tubercle of the atlas
the most supeficial structure in the carotid sheath of the ox is the ______
internal jugular vein
what is viborgs trianlge
dorsal boundary: tendon of insertion of sternomandibularis
cranial border: ramus of mandible
ventral border: linguofacial vein
what is viborgs triangle used for
may be used to surgically drain the guttural pouch
what can the atlanto-occipital space be used for
CSF collection and injection of radiopaque contrast media into vertebral canal to assess cervical vertebral stenosis (wobblers)
what does wobblers result from
malformation of the articular processes of primarily vertbrae C3-C4 in horses; due to malformatio the spinal cord is compressed
stallions accumulate fat where
in the crest of the neck
where should IM injection sbe given in the horse
in the middle of the neck where muscles are thickest
ventral branch of accessory nerve can be biopsied to diagnose
equine motor neuron disease
what is cribbing
grasps an object with its upper incisors and pulld the head back arching neck muscles; horses draw air into the esophagus
lacerations and penetrating injuries in the cranial shoulder region may cause injury to the
cephalic vein
where do you perform a tracheotomy (temporary)
between 4th and 5th or 5th and 6h tracheal rings
where do you perform a tracheostomy (permanent)
at the level of tracheal rings 4 through 6
what is choke
impaction of hard or firm food in the esophagus that stays in one place and produces pressure necrosis of adjacent structures
damage to recurrent laryngeal nerve results in
pralysis of the cricoarytenoideus dorsalis muscle causing laryngeal hemiplegia or “roaring” (primarily left side involved)
what are also found in the same region as the thyroid gland
cranial deep cervical lymph nodes
clinical signs for ____ are similar to rabies
choke
what are the 3 common places choke can occur in ox
- at the level of the larynx
- the thoracic inlet due to the narrow passage between the first pair of ribs
- thoracic cavity
in ox, are lymph nodes palpable?
no
what lymph nodes are palpable in the horse?
mandibular lymph nodes