Anatomy sem 1 Flashcards
Identify the bones of the skull:
(excluding- 2, 8, 9, 10)
1= Parietal
3= spenoid
4= temporal
5= occipital
6= mandible
7= frontal
What are the sutures and structures of 2, 8 and 9?
2= Lambdoid suture
8= coronal suture
9= Pterion
What bone is this?
sphenoid
What bone is this?
Maxilla
What is the passageway that leads from the ear called?
External acoustic meatus
What are the cranial foramina?
- 1=superior orbital fissue
- 2=foramen rotundum
- 3=foramen ovale
- 4=foramen spinosum
- 5=hypoglossal canal
- 6=foramen magnum
- 7=cribiform plate
- 8=foramen lacerum
- 9=internal acoustic meatus
- 10=jugular foramen
What are the following muscles?
- Orbicularis oculi
- Nasalis
- Baccuinator
- Masseter
- Frontalis
- Temporalis
- Orbicularis oris
- Platsma
- Zygomaticus major
- Depressor labii inferioris
What are the two parts of orbicularis oculi and what is it action?
Closes eyelids
There are two parts; orbital (below) and palpebral
What is the action of nasalis?
Compresses the nares
What is the function of procerus and where is it?
Pulls the eyebrows down
What is the function of zygomaticus major?
Draws angle of the mouth superiorly
What is the function of buccinator?
Pulls the cheeks inward
What is the function of levator labii superioris and depressor labii inferioris?
depressor= depresses lower lip
levator= elevates upper lip
What is this muscle?
Levator labii superior
What is this muscle?
Depressor labii inferior
What are muscles of facial expression innervated by and what cranial foramen does this nerve pass through?
The facial nerve- passes through the stylomastoid foramen, just below the ear canal
What is the mneumonic for the facial nerves and what are they?
To Zanzibar By Motor Car
Temporal, zygomatic, buccal, marginal mandibular and cervical
What muscle is this and what is it’s function?
Lateral Ptyergoid- laterally moves and protracts mandible
What muscle is this and what is it’s action?
Medial Pterygoid- elevation and protrusion of the mandible
What muscle is this and what is it’s action?
Masster- elevates mandible
What muscle is this and what is it’s action?
Temporalis- elevates and retracts the mandible.
What are the muscles of mastication?
Muscles required for chewing
Temporalis, masseter, lateral pterygoid and medial pterygoid
What nerve are the muscles of mastrication innervated by and what cranial foramen does this nerve exit through?
Mandibular branch of the Trieminal nerve (cranial nerve 5)
Foramen ovale
What are C1 and C2 called?
C1= atlas
C2= axis
What is this muscle and what is its action?
Platysma- Depress mandible and angle of mouth
What is this muscle and what is it’s action?
Trapizius
- Elevation of scapula
- Retraction of scapula
- Depression of scapula
- Rotation of the scapula
What is this muscle and what is it’s action?
Sternocleidomastoid
Side flex and rotation of the head
What nerve are trapezius and sternocleidomastoid innervated by?
Accessory nerve- cranial nerve 11
At which vertebral level do the common carotids bifurcate?
C3/C4
Where does the internal jugular vein begin?
As a continuation of the sigmoid sinus, at the jugular foramen
Which vessel supplies structures within the neck and face?
External carotid artery
Where do the internal jugular veins drain to?
Left and right brachiocephalic veins respectively
What are the 6 extraocular muscles that are responsible for movement of the eyeball?
4 x rectus muscles (superior, inferior, medial, lateral)
2 x oblique muscles (superior, inferior)
What structures form the nasal septum?
Perpendicular plate of ethmoid, vomer, and nasal septal cartilage
What are the specialised structures arising from the nasal cavity that assist with warming, filtering and humidifying?
Nasal Conchae (superior, middle and inferior)
What are the missing labels for this diagram?
What are the 4 paranasal sinuses that drain into the nasal cavity?
Maxillary, frontal, sphenoid and ethmoid sinuses
What are the boundaries for the oral cavity?
Roof = Hard and soft palates Walls = Buccinator muscles, lined by oral mucosa Floor = Muscular diaphragm (mylohyoid muscles) and tongue
At which point do the nasal and oral cavity become continuous?
Nasopharynx
What is Waldeyer’s ring and what tonsils are a part of this?
A ring of lymphoid tissue found in the throat, consisting of pharyngeal tonsil (adenoid), tubal tonsils, palatine tonsils and lingual tonsils.
How are transverse sections of CT and MRI viewed?
Should be viewed as if you were standing at the foot of their bed, looking up from below.
How can you tell the difference between thick and thin skin?
Thin skin has hair follicles present
Thick skin does not have hair follicles
What are the 3 layers of skin?
What are the arrows pointing to on the diagram?
What are the arrows pointing to on the x-ray?
What are the arrows pointing to on this CT?
What are the arrows on the CT pointing towards?
What is the anatomical position?
What do superior, inferior, posterio, anterior, proximal, distal, lateral and medial mean?
What are sagittal, coronal, transverse and oblique planes?
What are the different cavities of the body?
What are synovial and solid joints?
Synovial are the most moveable joints in the body. Most abundant in body. There are types of synovial joint- ball and socket, gliding, pivot and hinge
Solid joints are immobile, two types fibrous and cartilaginous
What is the differences between ligaments and tendons?
Ligaments link bone to bone
Tendons link muscle to bone.
What is flexsion and extension?
○ Flexion decreases the angle between bones, bends or folds one part on another.
○ Extension increases the angle between bones, returns back from flexed position
What is abduction and adduction?
○ Abduction moves a part away from the medium of the body
○ Adduction moves a part toward the medium plane
What is rotation in anatomical terms?
Rotation consists of pivoting bone on its own axis
What is pronation and supination?
○ Pronation twists the forearm so the thumbs point medially
○ Supination twists the forearm back
What is inversion and eversion?
○ Inversion turns in the sole of the foot inwards
○ Eversion turns it outward
What are landmarks, levels and lines in anatomical terms?
Landmarks- structures you can feel from outside the skin
Levels- most useful on the trunk, eg something can be located if it is in line with another structure
Lines- may be able to find structures by drawing lines on the skin
What are the features shown of a vertebra?
What are the differences between the cervical, thoracic and lumbar parts of the spine?
Cervical: Small, round body
Thoracic: Heart-shaped body
Lumbar: Large kidney-shaped body
What are the specialised features of C1?
No body: has ‘anterior arch’ instead; no spinous process: has ‘posterior arch’ instead; elongated, curved superior articular facet – for articulation with occipital condyle; very flat inferior articular facet for articulation with C2.
What are the following arrows on the diagram?
C1- atlas
What are the specialised features of C2 (axis)?
It has a body with an extra superior projection (‘dens’), and a rounded superior articulate facet for atriculation with C1.
What do the arrows on the diagram point to?
What movement occurs between the atlas and the occipital condyles?
Flexion / Extension – nodding your head
What movement occurs between the axis and atlas
Rotation- shaking ur head
What are the 3 groups of muscles in the back?
Superficial, deep and intermediate
What is the action of the superficial muscles in the back?
Movement of upper limbs
What is the action of the intermediate muscles of the back?
Respiration
What are the actions of the deep muscles of the back?
Movement of spinal column and posture
What muscle is this and what is it’s action?
Trapezius,
extends and laterally flexes the head and neck
Elevates, depresses, retracts and rotates the shoulder
What muscle is this and what is it’s action?
Rhomboid muscle, retracts and downwardly rotates pectroal (shoulder girdle)
Who is John?
What is this mucle group?
Erector spinae- collective name for a group of muscles found in the intermediate layer of the back
What are the 3 muscles of erector spinae?
Spinalis, longissimus and iliocostalis
Which muscle is this and what is its function?
Spinalis-extends and laterally flexes neck and trunk
What muscle is this and what is it’s function?
Longissimus
Extends and laterally flexes head, neck and trunk
What muscle is this and what is it’s function?
Iliocostalis
Extends and laterally flexes head and trunk
What muscle is this and what is it’s action?
Levator scapulae
Elevates and downwardly rotates shoulder girdle
What muscle is this and what is it’s action?
Serratus posterior superior
Elevates ribs
What nerve are the intermediate and deep muscle groups of the back innervated by?
Dorsal/ posterior rami of spinal nerves
What are the superficial muscles of the back innervated by?
All the muscles are innervated by the anterior rami of cervical spinal nerves except for the trapezius which is supplied by cranial nerve XI.
What are the missing muscles of this diagram?
What is the cauda equina?
The cauda equina is the sack of nerve roots at the lower end of the spinal cord. These nerve roots provide the ability to move and feel sensation in the legs and the bladder
What is the conus medularis?
The conus medullaris is the tapering distal end of the spinal cord
What are the missing labels on this diagram?
What is the Filum terminale?
The filum terminale (FT) is a fibrous band that extends from the conus medullaris to the periosteum of the coccyx to fixate the spinal cord
At what vertebral level does the spinal cord end?
L1/L2
What is the name for the opening within each vertebra through which the spinal cord travels?
Veryebral foramen
At what level is a lumbar puncture performed?
Between L2- L5, this avoids hitting the spinal cord
What is the name of the opening in the skull from which the spinal cord emerges?
Foramen magnum
What are the labels on the diagram below of a cross section of the spinal cord?
What is the name of this condition?
Scoliosis
What is this condition?
Kyphosis
What are the pedicles and lamina of a vertebra?
What is this bone called?
Scapula
What is this part of the scapula?
Spine
What is this part of the scapula?
Glenoid fossa
What is this part of the scapula?
Supraspinous fossa
What is this part of the scapula?
Infraspinous fossa
What is this part of the scapula?
Superior angle
What is this part of the scapula?
Inferior angle
What is this part of the scapula?
Acromion
What is this part of the scapula?
Coracoid process
What is this part of the scapula?
Subscapular fossa
What is this bone?
Clavicle
What are the two ends of the clavicle called?
Sternal end and acromial end
What is this bone called?
humerus
What is this part of the humerus called?
Greater tubercle
What is this part of the humerus called?
Lesser tubercle
What is this part of the humerus called?
Intertubular sulcus
What is this part of the humerus called?
Capitulum
What is this part of the humerus called?
Trochlea
What is this part of the humerus called?
Olecranon fossa
What is this part of the humerus called?
Coracoid fossa
What is this part of the humerus called?
Radial fossa
What is this part of the humerus called?
Medial epicondyle
What is this part of the humerus called?
Lateral epicondyle
On what side of the humerus are the tubercles and epicondyles situated?
The anterior side
What bone is this?
The radius
What part of the radius is this?
Radial tuberosity
What part of the radius is this?
Radial styloid process
What part of the radius is this? (posterior view)
Dorsal tubercle
What bone is this?
Ulna
What part of the ulna is this?
Radial notch
What part of the ulna is this?
Olecranon
What part of the ulna is this?
Coronoid process
What part of the ulna is this?
Ulnar styloid process
What part of the ulna is this?
Trochlear notch
What two carpal bones from an articulation with the radius?
Scaphoid and lunate
What do you notice about the phalanges in the thumb versus those in the other digits?
Thumb only has two phalanges, all other digits have 3
It is missing middle phalange
What are the missing labels on the diagram?
What are the 3 types of phalange bones?
Proximal, middle and distal
What are the names of the carpal bones in the hand?
What is the mneumonic for remembering the carpal bones?
Some – Scaphoid
Lovers – Lunate
Try – Triquetrum
Positions – Pisiform
That – Trapezium
They – Trapezoid
Can’t – Capitate
Handle – Hamate
What are the sutures shown below?
Coronal (left to right)
Sagittal (midline)
What are the different types of vertebrae?
7 Cervical
12 Thoracic
5 Lumber
5 Sacrum (fused together)
What muscle is this, what layer is it in and what is it’s action?
Latissimus dorsi, superficial group and adducts and extends arm
What is this muscle, what group is it part of and what is it’s action?
Serratus posterior inferior, intermediate layer and depresses the ribs
What are the 3 layers of conenctive tissue surrounding the spinal cord?
Connective tissue= meninges
First is dura mater which is thick, the second arachnoid mater is almost spider like tissue and is filled with spinal fluid and the 3rd is pia mater is exceptionally fine.
What bone is this?
Femur
What part of the femur is this?
Greater trochanter
What part of the femur is this?
Lesser trochanter
What part of the femur is this?
Medial condyle
What part of the femur is this?
Lateral condyles