axial skeleton Flashcards
skull bones
frontal, parietal, temporal, sphenoid, occipital, ethmoid, nasal, zygomatic, mandible, vomer, lacrimal
sutures
sagittal, coronal(frontal), squamosal, lamboidal
C1(atlas)
ring-shaped bone that begins at the base of your skull
control your forward, backward and side head and neck movements
C2(axis)
allows the atlas to pivot against it for the side-to-side “no” rotation of your head.provides sensation to the upper area of your head
control your forward, backward and side head and neck movements
C3
gives sensation to the side of your face and back of your head
control your forward, backward and side head and neck movements
C4
controls your upward shoulder motion and is one of the nerves that control your diaphragm (muscle at the bottom of your rib cage that helps you breathe). provides sensation for parts of your neck, shoulders, and upper arms.
C5
controls the deltoid muscles of your shoulders and your biceps, provides sensation to the upper part of your upper arm down to your elbow
C6
Controls the extensor muscles of your wrist and is involved in the control of your biceps, provides sensation to the thumb side of your forearm and hand
C7
controls your triceps and wrist extensor muscles, and provides sensation to the back of your arm into your middle finger
S1(sacrum)
nerves affect the hips and groin.
S2
S2 nerves affect the back of the thighs.
S3
nerves affect the medial buttock area.
S4& S5
nerves affect the perineal area. The perineum is between the legs. It is the diamond-shaped area containing the anus, and in females, the vagina.
Coccyx
provides slight support for the pelvic organs but actually is a bone of little use.
L1
provides sensation to your groin and genital area and helps move your hip muscles.
L2,L3,L4
provide sensation to the front part of your thigh and inner side of your lower leg. These nerves also control hip and knee muscle movements.
L5
provides sensation to the outer side of your lower leg, the upper part of your foot and the space between your first and second toe. This nerve also controls hip, knee, foot and toe movements.
sciatic nerve
The sciatic nerve consists of the L4 and L5 nerves plus other sacral nerves. Your sciatic nerve starts in your rear pelvis and runs down the back of your leg, ending in your foot.
T1 & T2
These nerves go into the top of your chest and into your arms and hands. The T1 nerve is also part of the brachial plexus, a network of nerves in your shoulders that carries movement and sensory signals from your spinal cord to your arms and hands.
T3 through T5 nerves
These nerves go into your chest wall. Together, these nerves help control your rib cage, lungs and diaphragm, and the muscles that help you breathe
T6 through T12 nerves
These nerves affect your abdominal and back muscles. These nerves, along with certain muscles, help with balance and posture, and they help you cough.