Bone Physiology Flashcards
Condyle
A rounded protuberance at the end of a bone (end of long bones and in skull)
Crest
Raised area of bone (found in skull)
Foramen
A hole or opening within a bone (usually for nerves)
Fossa
A depression within a hole where another structure is found - Socket part of joints
Muscle usually sits in it
Groove
A depression in a bone (linear groove for nerves and blood vessels)
Process
A thin, elongated projection (finger off bone)
Sinus
A narrow hollow cavity (found in face followed with air)
Spine
The central part of a bone (spine of the scapula)
Trochanter
A prominent area of the femur that lies behind the head of the femur (only found on femur)
Tubercle
A small elevation on the surface of a bone
Tuberosity
The area of the tubercle where the tendons attach (end of tubercle)
Cranium
Big circle of bone that houses brain
Maxilla
Upper jaw and nasal chambers directly attached to front of cranium
Mandible
Lower jaw
Attached to cranium and maxilla via muscles and some ligaments
Hyoid apparatus
Attaches to tongue, larynx and skull
Supports tongue
Suspends larynx from skull
Hyoid bone - made of many small bones
What are the 4 main bones of the head
Cranium
Maxilla
Mandible
Hyoid apparatus
Sutures
Cranium, maxilla, mandible made up of smaller bones joined together by sutures (fibrous joints made of collagen)
Composite parts of cranium
Foramen magnum
frontal bone
occipital bone
orbit
parietal bone
sphenoid complex
temporal bone
Tympanic bulla
Zygomatic arch
Composite parts of maxilla
Incisive bone
Nasal bone
Maxilla bone
Palatine bone
Composite parts of mandible
Alveoli (areas for tooth attachment)
Condylar process
Coronoid process
Ramus
Symphysis
Mandibular symphysis
Foramen magnum
Hole at back of skull where spinal cord exits
Frontal bone
Essentially the forehead
Occipital bone
Back of bone that houses optic foreamen where optic nerve travels through
Orbit bone
Where eyes sit
Underneath is the cheekbone (zygomatic arch)
Parietal bone
Caudal part of skull at the top
Sphenoid complex
Very bouncy due to lots of little bones joined together
Temporal bone
Part of zygomatic arch
Has a temporal process of zygomatic bone
Lacrimal bone
2 lots either side inside of eye / orbit formimg the eye socket
Tympanic bulla
Part of temporal bone surrounding ear canal
Zygomatic arch (cheek bone)
Zygomatic bone
Temporal process of zygomatic bone
Sphenoid complex
Zygomatic process of temporal bone
Incisive bone
Where incisors root goes into
Nasal bone
Top of nose above maxilla
Palatine bone
Make up hard and soft palate
Maxilla bone
Biggest In maxilla
Hold teeth
Infraorbital foremen runs through maxilla (nerves come out of this for feelings in teeth and jaw)
Alveoli
Areas of tooth attachment/ holes for teeth
Hyoid apparatus
Series of small bones which suspend the tongue and larynx from the skull
External
External auditory meatus
Ear canal
Mandibular symphysis
Made of collagen
Weaker than cartilage
Cats
Masseteric fossa
Indent of ramus masseter Where muscles sits in used for chewing/mastication
Mandibulae body
Shaft
Which bone of the skull does hyoid apparatus attach to
Temporal bone
List foramens in jaw (holes)
Mandibular foramen
Mental foramen (front)
List foreamens in maxilla
Infraorbital foramen
3 skull types
Dolicocephalic
Mesocephalic
Brachycephalic
Dolicocephalic
Long narrow head
Eg whippets, lurchers, greyhounds, collies
Simese and Burmese cat
Mesocephalic
Medium sized head
German shepherd, Labrador, Bernese mountain dog, wolf
Tabby, domestic shorthair,
Brachycephalic
Short wide head
Pug, boxer, bulldog, chihuahua
Persian cat
Poor development of skull
Small cranium
Brain being squeezed (parts of cerebellum push out of back of skull)
Magnum foramen
Syringomyelia
Fluid build up in brain/spinal chord most common in CKC spaniels
Sinuses in dogs, cats horses
Dogs/cats - frontal (one on each side of forehead) and maxillary sinuses (just 1)
Horse - complex network of sinuses 6 pairs
More sinuses = larger/heavier skull
Horses sinuses
2x Frontal sinus
2x Caudal maxillary sinus
2x rostral maxillary sinus
2x ventral conchal sinus
2x dorsal chonchal sinus
2x palatine sinus
Frontal sinuses
Forehead
Caudal maxillary sinus
Back of jaw
Rostral maxillary sinus
Front of nose
Ventral conchal sinus
Bottom of turbinate bone
Dorsal conchal sinus
Top of turbinate bones
Palatine sinus
In palatine bone so roof of mouth
Intervertebral disc
Between each vertebrae body
Shock absorber to minimise damage to spinal cord
Allows flexibility
Spinous process
Largest process on spine
Causes withers
No spinous process on tail part of spine
Spine/vertebral column
Spinous process
Caudal articular process
Accessory process
Vertebral foramen
Body
Transverse process
Cranial articular process
Mammillary process
Vertebral foramen
Hole where spinal cord passes through all the way along spine
Body
Largest piece of bone
Between each is intervertebral discs
Transverse process
One on each side of vertebrae all the way down spine
Cranial/caudal articular process
For attachment with next process
Cranial/caudal process
Forms attachment with the next process
Mamillary process
Muscles attach onto them