Shared Flashcard Set

Details

Chapter 7
The Axial Skeleton
45
Anatomy
Undergraduate 2
11/03/2017

Additional Anatomy Flashcards

 


 

Cards

Term
what are the bones in the axial skeleton?
Definition
Skull, bones associated with the skull, vertebral column, and thoracic cage
Term
what are the purposes of the axial skeleton?
Definition
provides a framework that supports and protects the brain, spinal cord, and the thoracic and abdominal organs. Provides surface area for the attachment of muscles that 1)adjust the positions of the head, neck, and trunk; 2)perform respiratory movements; 3)stabilize or position parts of the appendicular skeleton.
Term
How many bones in the skull?
Definition
22 bones:8 form the cranium (braincase), and 14 are facial bones
Term
articulations
Definition
form where 2 bones connect (joints)
Term
functions of sinuses
Definition
1)lessen the weight of the bone
2) the mucous membrane lining them produces mucus that moistens and cleans the air in and adjacent to the sinus
3)resonating chambers in speech production
Term
lambdoid suture
Definition
across the posterior surface of the skull. Connects the occipital bone and the 2 parietal bones.
Term
coronal suture
Definition
attaches the frontal bone to the 2 parietal bones
Term
Calvaria (skullcap)
Definition
formed by the occipital, parietal, and frontal bones
Term
Sagittal suture
Definition
from the lambdoid suture to the coronal suture, between the parietal bones
Term
squamous sutures
Definition
joins the temporal bone and the parietal bone
Term
facial bones (14)
Definition
Maxillae (2), palatine bones (2), nasal bones (2), inferior nasal conchae (2), zygomatic bones (2), lacrimal bones (2), vomer (1), mandible (1).
Term
cranium bones (8)
Definition
occipital (1), parietal (2), frontal (1), temmporal (2), sphenoid (1), ethmoid (1).
Term
other bones associated with the skull (7)
Definition
hyoid (1), auditory ossicles (6).
Term
orbits
Definition
bony recesses that contain the eyes
Term
orbital complex
Definition
frontal bone-roof; maxilla-most of the floor; maxilla, lateral mass of the ethmoid, and lacrimal bone-orbital rim and 1st portion of the medial wall; sphenoid and maxilla articulate with the zygomatic-lateral wall and rim of the orbit
Term
paranasal sinuses
Definition
air-filled chambers connected to the nasal cavities
Term
fontanelles
Definition
fibrous, non-ossified areas between the cranial bones
Term
anterior fontanelle (soft spot)
Definition
largest fontanelle, it lies at the intersection of the frontal, sagittal, and coronal sutures in the anterior portion of the skull.
Term
occipital fontanel
Definition
at the junction between the lambdoid and sagittal sutures
Term
sphenoidal fontanelles
Definition
at the junction between the squamous sutures and the coronal suture.
Term
mastoid fontanelles
Definition
at the junction between the squamous sutures and the lambdoid suture.
Term
deviated septum
Definition
a bend in the septum (boxers and hockey players)
Term
4 spinal curves
Definition
cervical, thoracic, lumbar, and sacral
Term
primary curves (accommodation curves)
Definition
the thoracic and sacral (present at birth)
Term
secondary curves (compensation curves)
Definition
the lumbar and cervical (develop after birth).
lumbar forms when the baby begins to walk
cervical forms when the baby learns to hold up his head
Term
craniostenosis
Definition
premature closure of one or more fontanelles causing unusual distortions of the skull.
Term
3 parts of a vertebra
Definition
(1)vertebral body
(2)vertebral arch
(3)articular processes
Term
vertebral body
Definition
transfers weight along the axis of the vertebral column
Term
vertebral arch
Definition
forms the posterior margin of each vertebral foramen; has walls called pedicles, and a roof formed by flat layers called laminae
Term
spinous process
Definition
projects posteriorly from the point where the vertebral laminae fuse to complete the vertebral arch. Can see and feel when the spine is flexed.
Term
vertebral canal
Definition
encloses the spinal cord
Term
intervertebral foramina
Definition
gaps that separate pedicles of successive vertebrae, permit the passage of nerves
Term
kyphosis
Definition
hump-backed
Term
lordosis
Definition
sway-back
Term
scoliosis
Definition
abnormal curvature of the spine
Term
5 vertebral regions
Definition
cervical, thoracic, lumbar, sacral, and coccygeal
Term
cervical vertebrae
Definition
C1-C7
Term
thoracic vertebrae
Definition
T1-T12
Term
lumbar vertebrae
Definition
L1-L5
Term
bifid
Definition
a notched spinous process, found on C2-C6
Term
the atlas
Definition
cervical vertebra C1-holds up the head; permits you to nod;lacks a body and a spinous process, has a large, round vertebral foramen bounded by anterior and posterior arches
Term
axis
Definition
C2 (axis); during development the body of the atlas fuses to the body of the axis, creating the dens, or odontoid process of the axis. A transverse ligament binds the dens to the inner surface of the atlas forming a pivot for rotation of the atlas and skull; the axis allows us to shake our heads no.
Term
ligamentum nuchae
Definition
a stout elastic ligament that starts at the vertebra prominens and extends to an insertion along the occipital crest of the skull.
Term
vertebra prominens
Definition
C7, the interface between the cervical curve and the thoracic curve. The transverse processes are large, providing additional surface area for muscle attachment.
Term
costal facets
Definition
articulate with the heads of the ribs.
Supporting users have an ad free experience!