session 1 Flashcards
Major compartments of The head:
- The cranial cavity
- Two ears
- Two orbits
- Two nasal cavities
- An oral cavity
Head skeleton. numbers
22 bones.
Head skeleton divide into two-part?
Cranium + Mandible
Cranium bones divide to?
Calvaria + Face
Calvaria( skull cap) consists of several bones?
The bones forming the calvaria are mainly
the paired temporal and parietal bones
,
parts of the unpaired frontal, sphenoid, and occipital bones.
Facial skeleton
The bones forming the facial skeleton -palatine bones(2) -nasal bones, (2) -lacrimal bones(2) -zygomatic bones, (2) -inferior nasal conchae(2) vomer.(1) maxillae(1)
Several bones of the head articulating with each other by ?
immovable fibrous joints called sutures.
define( fontanelles)
large membranous and unossified gaps (fontanelles) particularly between the large flat bones of the skull covering the top of the cranial cavity in a fetus
what fontanelles allow
- the head to deform during its passage through the birth canal
- postnatal growth.
SCALP layers consist from?
It is a multilayered structure that covers the bones of the skull
- S- skin
- C- connective tissue (dense)
- A- aponeurotic layer
- L- loose connective tissue
- P- pericranium
from where the borders of the sclap
from superciliary arches anteriorly to the external occipital protuberance and superior nuchal lines posteriorly. Laterally it continues inferiorly to the zygomatic arch
Innervation of scalp (anterior to the ear and varex )?
- Supratrochlear nerve
- Supra-orbital nerve
- Zygomaticotemporal nerve
- Auriculotemporal nerve
which main nerve responsible for supplying the anterior of the scalp
The trigeminal nerve (CN V)
The supratrochlear nerve,
branch of the ophthalmic division of the trigeminal nerve—–
it passes backward close to the median plane and reaches nearly as far as the vertex of the skull
The supraorbital nerve
a branch of the ophthalmic division of the trigeminal nerve,—–. It supplies the scalp as far backward as the vertex
The zygomaticotemporal nerve
a branch of the maxillary division of the trigeminal nerve, supplies the scalp over the temple
.Auriculotemporal nerve cautenous innervation
a branch of the mandibular division of the trigeminal nerve—Its terminal branches supply the skin over the temporal region
which nerves supply the Posterior to the ears and the vertex:
- Great auricular nerve
- Lesser occipital nerve
- Greater occipital nerve
- Third occipital nerve
.Great auricular nerve
Spinal nerves C2 and C3 via cervical plexus—-supply Skin overlying angle of mandible and inferior lobe of auricle; parotid sheath
Great auricular Ascends vertically across ———-
sternocleidomastoid
Lesser occipital nerve supply?
Spinal nerves C2 and C3 via cervical plexus——supply Scalp posterior to auricle
Lesser occipital follows posterior border of ————-
sternocleidomastoid muscle
Greater occipital nerve
As medial branch of posterior ramus of spinal nerve C2——-Scalp of occipital region
Third occipital nerve
As lateral branch of posterior ramus of spinal nerve C3—–Scalp of lower occipital and sub occipital regions
